The present invention generally relates to a random number generator (100, 400, 500, 600, 800) comprising a light sensor (110, 310, 710, 810), comprising a plurality of pixels (111, 311, P0-Pn) configured to output a corresponding plurality of digital signals (S0-Sn), each digital signal encoding a digital value representative of an amount of light reaching the respective pixel (111, 311, P0-Pn, P′0-P′n), and a controller (120), configured to generate (S240) a random number (RN) based on at least part of at least one of the plurality of digital signals (S0-Sn).
The disclosure relates to a controllable and/or self-controlling robot comprising a monolithically integrated entropy source having: a photon source that is designed to emit photons, the photon source comprising a first outer shell, said first outer shell being formed by a first base surface, a first top surface, and at least one first side surface connecting the first base surface and the first top surface to one another; and a photon detector that is designed to detect the photons emitted by the photon source, the first base surface of the photon source being arranged so as to face the photon detector.
The disclosure relates to a node of a network, the node comprising a monolithically integrated entropy source having: a photon source that is designed to emit photons, the photon source comprising a first outer shell, said first outer shell being formed by a first base surface, a first top surface, and at least one first side surface connecting the first base surface and the first top surface to one another; and a photon detector that is designed to detect the photons emitted by the photon source, the first base surface of the photon source being arranged so as to face the photon detector.
The present invention relates to a clock synchronization method comprising the steps of determining (S101) whether the emitter and the receiver are within acceptable frequency range difference, calculating (S102) a drift difference accumulated over a chosen time and obtaining a time compensation based on it, applying (S103) a compensation either to the clock phase shift or to the external frequency generator, and continuously (S104) tracking a frequency difference change between the emitter and the receiver by repeating the above steps.
The present invention relates to a quantum key distribution receiver comprising a unique single detector adapted to detect qubits composed of low power optical pulses in specified time-bins, A being the Advanced time-bin and D being the Delayed time-bin, an interferometer with two unequal arms, one short arm (S) and one long arm (L) adapted to create an interference between the two successive time-bins A and D so as to create three time bins AS, AL&DS, DL, characterized in that said receiver is adapted to control the single detector so as to work in a gated mode, where he chooses when the detector is active and when it is not and to choose in which basis he will measure, such that for each qubit received and interfered by said interferometer, said receiver is adapted to activate its single detector for the DL and AS bins to measure in the Z basis, or to activate it for the AL&DS bin to measure in the X basis.
The present invention relates to a single-photon detector (2000) comprising a low temperature region (LT) and a high temperature region (HT), wherein a temperature in the low temperature region (LT) is lower than a temperature in the high temperature region (HT), a superconducting nanowire (1100), a shunt impedance (2400) connected in parallel with the superconducting nanowire (1100), wherein the superconducting nanowire (1100) and the shunt impedance (2400) are both included in the low temperature region (LT). The invention further relates to a method (3000) for operating the single- photon detector (2000) so as to reduce measurement jitter.
The present invenon relates to a single-photon detector (2000, 3000, 4000, 5000) comprising a package (1300) defining a closed volume (V), a cooler (1200, 1210), detecng means (1100), posioned within the closed volume (V) and configured to detect photons emied from an opcal fiber (1400), and a cold shield (2500, 3500), posioned within the closed volume (V), wherein the detecng means (1100) are posioned within the cold shield (2500, 3500).
G01J 5/061 - Dispositions pour éliminer les effets des radiations perturbatricesDispositions pour compenser les changements de la sensibilité par commande de la température de l’appareil ou de ses parties constitutives, p. ex. par des moyens de refroidissement ou par des thermostats
The present invention relates to a multi-pixel superconducting nanowire single-photon detector (2000, 3000) comprising a first fractal superconducting nanowire single-photon detector (2100) comprising a first superconducting nanowire (2110) extending between a first start terminal (2120) and a first end terminal (2121) across a first area (A1), a second fractal superconducting nanowire single-photon detector (2200) comprising a second superconducting nanowire (2210) extending between a second start terminal (2220) and a second end terminal (2221) across a second area (A2), wherein the second area (A2) overlaps with the first area (A1).
The present invention relates to a Quantum Key distribution emitter (1) comprising a light source (2) adapted to emit light, and a light source driver (3) adapted to control said light source (2) through an electric current, characterized in that said light source driver (3) is adapted to vary the electric current to control the light source (2) to emit a pair of pulses such that the intensity between the two pulses in the pair is lowered to a minimum level above zero so as to keep a controlled phase between the two pulses.
H01S 5/062 - Dispositions pour commander les paramètres de sortie du laser, p. ex. en agissant sur le milieu actif en faisant varier le potentiel des électrodes
The present invention relates to a Quantum Key Distribution system comprising an emitter and a receiver adapted to exchange QKD-based keys comprising at least one memory and at least one controller, characterized in that the controller is configured to track parameters of the system and record them in said memory upon switch off of the system, and is configured to retrieve said recorded parameters of the system and apply them to the system upon a subsequent start-up phase.
The present invention relates to a Quantum Key Distribution system comprising an emitter and a receiver adapted to exchange QKD-based keys comprising at least one controller wherein, when the system is switched on, the controller is configured to execute a start-up phase comprising an optics calibration and a subsequent preliminary qubit exchange phase wherein the controller is configured to improve system performance and to judge whether the QKD statistics results in a positive key rate, characterized in that the qubit exchange phase comprises the emitter and the receiver exchanging qubits without authentication and without sending keys to the user.
The present invention relates to Superconducting Nanowire Photon Detector comprising a substrate, and a plurality of pixels provided on said substrate, wherein the pixels are separated from each other by a first linear distance, and characterized in that said substrate presents a concave surface profile between two pixels to present a length greater than said first linear distance.
The present invention relates to a quantum key distribution system (100) comprising an emitter (1) and a receiver (2) adapted to communicate through a quantum channel (3), and a channel monitoring means (11, 22, 23) adapted to measure a transmission attenuation value between said emitter (1) and said receiver (3), characterized in that said channel monitoring means (11, 22, 23) includes an optical source (11) adapted to generate an optical signal (SA), an optical signal detector (22) adapted to detect said optical signal (SZ) sent by the optical source (11) and a processing unit (23) adapted to determine a transmission attenuation value between the emitter (1) and the receiver (2).
The present invention generally relates to a hardware security system (1000) comprising a first hardware security module (1110), configured to store a secret, a second hardware security module (1120), configured to store the secret, a quantum key distribution network (1200) comprising a first quantum key distribution node (1210), a second quantum key distribution node (1220) and a quantum encrypted channel (1230), wherein the first quantum key distribution node (1210) is connected to the first hardware security module (1110), and wherein the second quantum key distribution node (1220) is connected to the second hardware security module (1120). The invention further relates to method for operating the hardware security system (1000).
The present invention relates to a Quantum Key Distribution System comprising an emitter and a receiver adapted to communicate, wherein the emitter comprises an optical pulse source adapted to generate an optical pulse to be sent to the receiver, and at least one random bit generator adapted to set a bit value, a basis value and an intensity value of said optical pulse, wherein said at least one random bit generator comprises a bit value source adapted to generate full entropy to set said bit value of said optical pulse, a basis value source and an intensity value source, characterized in that said basis value source and said intensity value source are adapted to process entropy with expanded randomness to set said basis and said intensity of said optical pulse.
The present invention relates to a Quantum Key Distribution system comprising an emitter and a receiver adapted to exchange QKD-based key through a service continuity mode comprising: starting (S100) the process and triggering (3101 ) QKD- based key exchange between the emitter and the receiver, exchanging (S102) a first key K1 between the emitter and the receiver, generating (S103) a second key K2 at the emitter via its QRNG, and encrypting (S104) K2 with K1 as a message C, and send it to the receiver, decrypting (S105) message C with K1 to obtain K2 at the receiver, and delivering (S106, S106') K2 to the respective consumers, characterized in that the QKD exchanged key K1 is a single key with fixed size, and the encrypting and decrypting procedures of K2 are using a symmetric encryption scheme.
The present invention relates to a Quantum Key Distribution system comprising an emitter and a receiver adapted to exchange QKD-based key comprising starting (S100) the process and triggering (S101) QKD-based key exchange between the emitter and the receiver, exchanging (S102) a first key K1 and a second key K2 between the emitter and the receiver, generating (S103) a third key K3 by expanding said first key K1 at both the emitter and the receiver; generating (S103) a fourth key K4 at the emitter via its QRNG, and encrypting (S104) K4 with K2 as a message C using a symmetric encryption scheme, and send it to the receiver, decrypting (S105) message C with K2 to obtain K4 at the receiver, generating (S106, S106') a fifth key K at the emitter and the receiver by computing K = K3 XOR K4 and delivering (S107, S107') K to the respective consumers.
The present invention relates to a Quantum Key Distribution Network comprising a Quantum Key Distribution layer comprising a plurality of pairs of emitters and receivers and a plurality of Core Nodes and Edge Nodes and a Key Management Layer adapted to exclusively receive XORed-keys from the Core Nodes, mix said XORed-keys from the Core Nodes, and send said mixed XORed-keys to the Edge Nodes of the QKD layer, in order to generate a shared key between said Edge Nodes.
The invention relates to a controllable and/or self-controlling robot comprising a monolithically integrated entropy source having: a photon source that is designed to emit photons, the photon source comprising a first outer shell, said first outer shell being formed by a first base surface, a first top surface, and at least one first side surface connecting the first base surface and the first top surface to one another; and a photon detector that is designed to detect the photons emitted by the photon source, the first base surface of the photon source being arranged so as to face the photon detector.
H04L 9/06 - Dispositions pour les communications secrètes ou protégéesProtocoles réseaux de sécurité l'appareil de chiffrement utilisant des registres à décalage ou des mémoires pour le codage par blocs, p. ex. système DES
G06F 7/58 - Générateurs de nombres aléatoires ou pseudo-aléatoires
H04L 9/32 - Dispositions pour les communications secrètes ou protégéesProtocoles réseaux de sécurité comprenant des moyens pour vérifier l'identité ou l'autorisation d'un utilisateur du système
28.
DISTRIBUTED NETWORK WITH DECENTRALISED MONOLITHIC RANDOM NUMBER GENERATION
The present invention relates to a distributed network with decentralised monolithic random number generation, in particular a distributed network with decentralised monolithic random number generation with a high random bit data rate in order to ensure network security and robustness. The distributed network consists of a plurality of nodes, each node having a hardware-based quantum random number generator. Such a quantum random number generator comprises an entropy source fabricated monolithically in a semiconductor substrate, said entropy source comprising a photon source and a single-photon detector which are arranged perpendicularly to each other and to the surface of the semiconductor substrate in question, enabling a particularly high random number data rate. Each quantum random number generator comprises means for operating the entropy source and means for generating quantum random numbers depending on the entropy source output signal of the entropy source. These quantum random number generators generate true random numbers decentrally with a high random bit rate without requiring a central node for generation or management. The random numbers are used to ensure the security, availability, and robustness of the network.
The invention relates to a node of a network, the node comprising a monolithically integrated entropy source having: a photon source that is designed to emit photons, the photon source comprising a first outer shell, said first outer shell being formed by a first base surface, a first top surface, and at least one first side surface connecting the first base surface and the first top surface to one another; and a photon detector that is designed to detect the photons emitted by the photon source, the first base surface of the photon source being arranged so as to face the photon detector.
H04L 9/32 - Dispositions pour les communications secrètes ou protégéesProtocoles réseaux de sécurité comprenant des moyens pour vérifier l'identité ou l'autorisation d'un utilisateur du système
H04L 9/06 - Dispositions pour les communications secrètes ou protégéesProtocoles réseaux de sécurité l'appareil de chiffrement utilisant des registres à décalage ou des mémoires pour le codage par blocs, p. ex. système DES
G06F 7/58 - Générateurs de nombres aléatoires ou pseudo-aléatoires
30.
INITIAL LATENCY REDUCTION IN QUANTUM KEY DISTRIBUTION
The present invention relates to a QKD communication method between an emitter and a receiver comprising the steps of distilling a secret key through a Privacy Amplification characterized in that the PA size is variable so as to ramp up from a first lower value to an end greater value.
1112222 to obtain m and symmetrically decrypts m with the key K' to recover the key K, characterized in that K' is obtained by the steps of generating, at the first node A, a key K' and a message m' to be sent to the second node B, sending the message m' to the at least one intermediary node T via a classical communication channel, which in turn forwards it to the second node B, and obtaining, at the second node, the key K' by using a private key and the message m'.
The present invention relates to Calibration system for calibrating a QKD emitter comprising said QKD emitter provided with a light source for generating light and an output connector for exiting the generated light, and a telecom characterization setup located at the output connector characterized in that the calibration system further comprises a pair of switchable connectors adapted to be switched between a first position where the connectors are exposed to the outside of the QKD emitter and a second position where the connectors are internally connected for providing a light path from the light source to the output connector, and an optical amplifier (5) connected to the connectors switched in the first position for calibration procedure.
The present invention relates to a clock synchronization method comprising the steps of determining (S101) whether the emitter and the receiver are within acceptable frequency range difference, calculating (S102) a drift difference accumulated over a chosen time and obtaining a time compensation based on it, applying (S103) a compensation either to the clock phase shift or to the external frequency generator, and continuously (S104) tracking a frequency difference change between the emitter and the receiver by repeating the above steps.
The present invention generally relates to a random number generator (100, 400, 500, 600, 800) comprising a light sensor (110, 310, 710, 810), comprising a plurality of pixels (111, 311, P0-Pn) configured to output a corresponding plurality of digital signals (S0-Sn), each digital signal encoding a digital value representative of an amount of light reaching the respective pixel (111, 311, P0-Pn, P'0-P'n), and a controller (120), configured to generate (S240) a random number (RN) based on at least part of at least one of the plurality of digital signals (S0-Sn).
The present invention relates to a RNG Chip testing method comprising a test start-up phase starting a Final Test phase, a data collection step wherein frames of bit sequences having a length of 1024 KB, preferably 512 KB generated by the RNG chip are collected, a uniformity determining step comprising calculating the uniformity of the bit sequence according the following formula: formula (I), a comparison step where the determined uniformity is compared to a predetermined threshold, and a judging step judging whether the chip has passed or failed the test based on the result of the comparison step.
The present invention relates to an Entropy measurement method comprising the steps of a start-up phase comprising powering on the entropy source unity, a signal emitting step comprising emitting a quantum signal characterized by an overall noise made of classical noise and quantum noise, a noise measurement step comprising measuring the statistics of overall noise through active pixels upon illumination and the statistics of classical noise through non-illuminated pixels, a quantum noise calculation step comprising calculating the quantum noise based on the difference between the overall noise and the classical noise, an health check step comprising comparing the resulting quantum noise to an expected quantum noise and/or a predetermined threshold and a health control step controlling the entropy source unit based on the result of the entropy estimation step.
H04N 25/633 - Traitement du bruit, p. ex. détection, correction, réduction ou élimination du bruit appliqué au courant d'obscurité en utilisant des pixels noirs optiques
37.
QUANTUM KEY DISTRIBUTION NETWORK AND QUANTUM-SECURED COMMUNICATION NETWORK INCLUDING THE ABOVE
The present invention relates to a Quantum Key Distribution Network comprising a Quantum Key Distribution layer comprising a plurality of pairs of emitters and receivers and a plurality of Core Nodes and Edge Nodes and a Key Management Layer adapted to exclusively receive XORed-keys from the Core Nodes, mix said XORed-keys from the Core Nodes, and send said mixed XORed-keys to the Edge Nodes of the QKD layer, in order to generate a shared key between said Edge Nodes.
Some embodiments provide methods and apparatus for quantum random number generation based on a single bit or multi bit Quanta Image Sensor (QIS) providing single-photon counting over a time interval for each of an array of pixels of the QIS, wherein random number data is generated based on the number of photons counted over the time interval for each of the pixels.
The invention relates to a QKD Communication intermediary component adapted to be placed between two remote QKD modules that are adapted to respectively send and/or receive quantum states to said QKD Communication intermediary component. Said QKD Communication intermediary component comprising: a post-processing unit, a synchronizing processing unit, at least two independent optical modules being adapted to prepare or measure the quantum states, which comprise raw key material to be exchanged with the two remote QKD modules, wherein the at least two independent optical modules send the information corresponding to the prepared and measured quantum states to the synchronizing processing unit, characterized in that the synchronizing processing unit is arranged to operate simultaneously with the first and second remote optical modules and the at least two independent optical modules so as to process said information received from the at least two independent optical modules and comprises at least one memory adapted to temporarily store data coming from one of the at least two optical modules until the data from the other optical module(s) is input in the synchronizing processing unit and is adapted to erase the said at least one memory in the timescale of two consecutive detection events after outputting necessary information to enable a key establishment at the two remote QKD modules.
The present invention relates to a lidar (1000) comprising an emitter (1100) and a receiver (1200), wherein the receiver (1200) comprises a discrete amplification photon detector (1210), wherein the receiver (1200) comprises a discriminator (1220), wherein the discriminator (1220) has an input connected to an output signal of the discrete amplification photon detector (1210), and wherein the discriminator (1220) is configured to output a signal indicating that the output signal of the discrete amplification photon detector (1210) is higher than a predetermined threshold.
G01S 17/18 - Systèmes déterminant les données relatives à la position d'une cible pour mesurer la distance uniquement utilisant la transmission d'ondes à modulation d'impulsion interrompues dans lesquels des fenêtres en distance sont utilisées
G01S 7/487 - Extraction des signaux d'écho désirés
G01S 17/931 - Systèmes lidar, spécialement adaptés pour des applications spécifiques pour prévenir les collisions de véhicules terrestres
41.
Method and device for recognizing blinding attacks in a quantum encrypted channel
A receiver for recognizes blinding attacks in a quantum encrypted channel having an optical fiber. The receiver includes a multipixel detector having a plurality of pixels, and configured to be illuminated by a light beam outputted by the optical fiber. A processing unit connects to the multipixel detector and is configured to determine the presence of a blinding attack if a predetermined number of pixels detects light within a predetermined interval. The receiver recognizes blinding attacks in a quantum encrypted channel and implements a method for recognizing blinding attacks in a quantum encrypted channel.
The present invention relates to a quantum key distribution method 2000 for distributing a secret key over a quantum communication channel between a transmitter and a receiver, the method comprising the steps of: synchronizing S2100 a clock between the transmitter and the receiver, distributing S2200 the secret key from the transmitter to the receiver, wherein the synchronizing step S2100 comprises: a first transmitting step S2120 for transmitting a N-th bit of the clock from the transmitter to the receiver, a second transmitting step S2130 for transmitting acknowledgement of reception of the N-th bit from the receiver to the transmitter, a first checking step S2140 for checking if the N-th bit is a most significant bit of the clock, and an incrementing step S2150 for incrementing the value of N if the first checking step S2140 indicates that the N-th bit is not the most significant bit of the clock.
A device for single-photon detection comprising two superconducting detectors, a bias-current source, a filter element and a readout circuit. Each detector forms a detection area for absorption of incident photons and is connected in parallel; each detector being maintained below its critical temperature and provided with an electrical bias current situated close to and below its critical current so as to be maintained in a non-resistive superconducting state, and configured to transition, at photon absorption, from the non-resistive state to a resistive state due to an increase in current density within the detector above the critical current. The readout circuit senses a voltage change corresponding to the, allowing creation of an event signal for each absorption of an incident photon by a detector. The device includes a current-redistribution portion for redistributing current arising after absorption of incident photons so as to avoid increases in current density above the critical current.
A quantum key distribution (QKD) system comprising: an emitter (110) adapted to generate a QKD free-space signal, a transmitter station (220) adapted to receive the free-space signal from the emitter (110), and a remote QKD receiving station (250) supporting a QKD receiver (160) located at a different location than the transmitter station, wherein the transmitter station is adapted to receive said free space signal from the emitter and to forward said signal through a fiber link (400) to the QKD receiver (160) in said remote QKD receiving station (250).
The present invention relates to an Entropy measurement method comprising the steps of a start-up phase comprising powering on the entropy source unity, a signal emitting step comprising emitting a quantum signal characterized by an overall noise made of classical noise and quantum noise, a noise measurement step comprising measuring the statistics of overall noise through active pixels upon illumination and the statistics of classical noise through non-illuminated pixels, a quantum noise calculation step comprising calculating the quantum noise based on the difference between the overall noise and the classical noise, an health check step comprising comparing the resulting quantum noise to an expected quantum noise and/or a predetermined threshold and a health control step controlling the entropy source unit based on the result of the entropy estimation step.
The present invention relates to a RNG Chip testing method comprising a test start-up phase starting a Final Test phase, a data collection step wherein frames of bit sequences having a length of 1024 KB, preferably 512 KB generated by the RNG chip are collected, a uniformity determining step comprising calculating the uniformity of the bit sequence according the following formula : formula (I), a comparison step where the determined uniformity is compared to a predetermined threshold, and a judging step judging whether the chip has passed or failed the test based on the result of the comparison step.
The invention relates to a IM bias voltage determining method adapted to determine an IM bias voltage corresponding to a desired Quantum Bit Error Rate based on the following formula
IM is the IM bias voltage.
G06F 11/07 - Réaction à l'apparition d'un défaut, p. ex. tolérance de certains défauts
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
G06N 10/00 - Informatique quantique, c.-à-d. traitement de l’information fondé sur des phénomènes de mécanique quantique
H04B 10/079 - Dispositions pour la surveillance ou le test de systèmes de transmissionDispositions pour la mesure des défauts de systèmes de transmission utilisant un signal en service utilisant des mesures du signal de données
The present relates to a quantum communication system for free space quantum key distribution. An emitter and a receiver, the emitter and the receiver are two points distanced by a free space quantum communication channel, the emitter being designed for wirelessly transmitting data to the receiver via said free space optical communication channel. The receiver includes an optical device capable of receiving the data within a predetermined field of view extending from said optical device toward the receiver. The system is characterized in that the emitter further comprises a light protecting device attached on said emitter. The light protecting device is configured to prevent any light coming from the environment beyond the emitter to enter within the field of view of the receiver. The invention further relates to a method for optimizing free space quantum key distribution.
H04B 10/00 - Systèmes de transmission utilisant des ondes électromagnétiques autres que les ondes hertziennes, p. ex. les infrarouges, la lumière visible ou ultraviolette, ou utilisant des radiations corpusculaires, p. ex. les communications quantiques
The present invention relates to a lidar (1000) comprising an emitter (1100) and a receiver (1200), wherein the receiver (1200) comprises a discrete amplification photon detector (1210), wherein the receiver (1200) comprises a discriminator (1220), wherein the discriminator (1220) has an input connected to an output signal of the discrete amplification photon detector (1210), and wherein the discriminator (1220) is configured to output a signal indicating that the output signal of the discrete amplification photon detector (1210) is higher than a predetermined threshold.
A photon detection device having a high light detection efficiency. The photon detection device includes a first light reception part which receives a gate signal and outputs a first signal; a second light reception part which receives a gate signal and outputs a second signal; and a determination part which determines whether or not a photon is received, on the basis of the first signal from the first light reception part and the second signal from the second light reception part. The photon is incident on the first light reception part among the first light reception part and the second light reception part, and the breakdown voltage of the second light reception part is higher than the breakdown voltage of the first light reception part.
H01L 31/107 - Dispositifs sensibles au rayonnement infrarouge, visible ou ultraviolet caractérisés par une seule barrière de potentiel ou de surface la barrière de potentiel fonctionnant en régime d'avalanche, p.ex. photodiode à avalanche
H01L 31/02 - Dispositifs à semi-conducteurs sensibles aux rayons infrarouges, à la lumière, au rayonnement électromagnétique d'ondes plus courtes, ou au rayonnement corpusculaire, et spécialement adaptés, soit comme convertisseurs de l'énergie dudit rayonnement e; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives; Leurs détails - Détails
G01J 1/42 - Photométrie, p. ex. posemètres photographiques en utilisant des détecteurs électriques de radiations
H01L 31/0232 - Dispositifs à semi-conducteurs sensibles aux rayons infrarouges, à la lumière, au rayonnement électromagnétique d'ondes plus courtes, ou au rayonnement corpusculaire, et spécialement adaptés, soit comme convertisseurs de l'énergie dudit rayonnement e; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives; Leurs détails - Détails Éléments ou dispositions optiques associés au dispositif
51.
DEVICE AND SYSTEM FOR SINGLE PHOTON DETECTION USING A PLURALITY OF SUPERCONDUCTING DETECTION MEANS CONNECTED IN PARALLEL
The present invention concerns a for single photon detection comprising at least two superconducting detection means (1) as well as a bias current source (2), a filter element (3) and a readout circuit (4), wherein each superconducting detection means (1) forms a detection area adapted for absorption of incident photons and is connected in parallel, each superconducting detection means (1) being maintained at a temperature below its critical temperature (TC) and provided with an electrical bias current (IB) situated close to and below its critical current (IC) such as to normally be maintained in a non-resistive superconducting state, and being adapted to transition, at photon absorption, from said non-resistive superconducting state to a resistive state due to an increase in current density within the superconducting detection means (1) above the critical current (IC), said readout circuit (4) being adapted to sense a voltage change corresponding to said transition of the superconducting detection means (1) into its resistive state, such as to allow to create an event signal for each absorption of an incident photon by any of said superconducting detection means (1). The device distinguishes itself by the fact that it further comprises at least one current re-distribution means (5) adapted for at least partly redistributing current arising after absorption of incident photons by any of said superconducting detection means (1) into said current re-distribution means (5), such as to avoid any of the superconducting detection means (1) not having absorbed an incident photon of suffering an increase in current density above its critical current (IC). The present invention also concerns a system for single photon detection comprising at least two such devices.
H04B 10/071 - Dispositions pour la surveillance ou le test de systèmes de transmissionDispositions pour la mesure des défauts de systèmes de transmission utilisant un signal réfléchi, p. ex. utilisant des réflectomètres optiques temporels [OTDR]
H04B 10/85 - Protection contre l’accès non autorisé, p. ex. protection contre l’écoute illicite
The present invention concerns a for single photon detection comprising at least two superconducting detection means (1) as well as a bias current source (2), a filter element (3) and a readout circuit (4), wherein each superconducting detection means (1) forms a detection area adapted for absorption of incident photons and is connected in parallel, each superconducting detection means (1) being maintained at a temperature below its critical temperature (TC) and provided with an electrical bias current (IB) situated close to and below its critical current (IC) such as to normally be maintained in a non-resistive superconducting state, and being adapted to transition, at photon absorption, from said non-resistive superconducting state to a resistive state due to an increase in current density within the superconducting detection means (1) above the critical current (IC), said readout circuit (4) being adapted to sense a voltage change corresponding to said transition of the superconducting detection means (1) into its resistive state, such as to allow to create an event signal for each absorption of an incident photon by any of said superconducting detection means (1). The device distinguishes itself by the fact that it further comprises at least one current re-distribution means (5) adapted for at least partly redistributing current arising after absorption of incident photons by any of said superconducting detection means (1) into said current re-distribution means (5), such as to avoid any of the superconducting detection means (1) not having absorbed an incident photon of suffering an increase in current density above its critical current (IC). The present invention also concerns a system for single photon detection comprising at least two such devices.
G01J 5/20 - Pyrométrie des radiations, p. ex. thermométrie infrarouge ou optique en utilisant des détecteurs électriques de radiations en utilisant des éléments résistants, thermorésistants ou semi-conducteurs sensibles aux radiations, p. ex. des dispositifs photoconducteurs
H01L 39/00 - Dispositifs utilisant la supraconductivité ou l'hyperconductivité; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives
G01J 1/42 - Photométrie, p. ex. posemètres photographiques en utilisant des détecteurs électriques de radiations
H01L 39/16 - Dispositifs commutables entre les états normal et supraconducteur
H01L 39/10 - Dispositifs utilisant la supraconductivité ou l'hyperconductivité; Procédés ou appareils spécialement adaptés à la fabrication ou au traitement de ces dispositifs ou de leurs parties constitutives - Détails caractérisés par les moyens de commutation
The present invention relates to a quantum key distribution method 2000 for distributing a secret key over a quantum communication channel between a transmitter and a receiver, the method comprising the steps of: synchronizing S2100 a clock between the transmitter and the receiver, distributing S2200 the secret key from the transmitter to the receiver, wherein the synchronizing step S2100 comprises: a first transmitting step S2120 for transmitting a N-th bit of the clock from the transmitter to the receiver, a second transmitting step S2130 for transmitting acknowledgement of reception of the N-th bit from the receiver to the transmitter, a first checking step S2140 for checking if the N-th bit is a most significant bit of the clock, and an incrementing step S2150 for incrementing the value of N if the first checking step S2140 indicates that the N-th bit is not the most significant bit of the clock.
A quantum key distribution (QKD) system comprising: an emitter (110) adapted to generate a QKD free-space signal, a transmitter station (220) adapted to receive the free-space signal from the emitter (110), and a remote QKD receiving station (250) supporting a QKD receiver (160) located at a different location than the transmitter station, wherein the transmitter station is adapted to receive said free space signal from the emitter and to forward said signal through a fiber link (400) to the QKD receiver (160) in said remote QKD receiving station (250).
A quantum key distribution (QKD) system comprising: an emitter (110) adapted to generate a QKD free-space signal, a transmitter station (220) adapted to receive the free-space signal from the emitter (110), and a remote QKD receiving station (250) supporting a QKD receiver (160) located at a different location than the transmitter station, wherein the transmitter station is adapted to receive said free space signal from the emitter and to forward said signal through a fiber link (400) to the QKD receiver (160) in said remote QKD receiving station (250).
The present invention relates to a receiver (2200) for recognizing blinding attacks in a quantum encrypted channel (1300) comprising an optical fiber, comprising a multipixel detector (2210) comprising a plurality of pixels, and configured to be illuminated by a light beam outputted by the optical fiber, and a processing unit (2220) connected to the multipixel detector (2210) and configured to determine the presence of a blinding attack if a predetermined number of pixels detects light within a predetermined interval. The invention further relates to the use of the receiver (2200) for recognizing blinding attacks in a quantum encrypted channel (1300) and to a method for recognizing blinding attacks in a quantum encrypted channel (1300).
An apparatus for enhancing secret key rate exchange over quantum channel in QKD systems includes an emitter system with a quantum emitter and a receiver system with a quantum receiver, wherein both systems are connected by a quantum channel and a service communication channel. User interfaces within the systems allow to define a first quantum channel loss budget based on the distance to be covered between the quantum emitter and the quantum receiver and the infrastructure properties of the quantum channel as well as a second quantum channel loss budget associated to the loss within the realm of the emitter system. The emitter system is adapted to define the optimal mean number of photons of coherent states to be emitted based on the first and the second quantum channel loss budgets.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; encryption apparatus; electronic
encryption units; data encryption apparatus; computer
software for encryption; encoding apparatus; decoding
apparatus; encoding and decoding apparatus; integrated
circuit; circuit boards; electronic number generators;
decryption software; decryption apparatus; electronic
decryption units; data decryption apparatus; computer
software for decryption; quantum key generation software;
quantum key generation apparatus; quantum key distribution
software; quantum key distribution apparatus; random number
generator; photon counter; single-photon detector. Data encryption services; data decryption services; data
encryption and decoding services; encryption, decryption and
authentication of information, messages and data; design of
integrated circuits; design of electric circuit boards;
research relating to telecommunication techniques; research
in the field of information technology; research in the
field of telecommunications technology; research services in
the field of engineering; scientific research; computer
security services in the nature of administering digital
certificates; research in the field of quantum encryption;
research in the field of quantum decryption; research in the
field of quantum cryptography; research in the field of
quantum-based telecommunication; research in the field of
single-photon based telecommunication; research in the field
of optics; development in the field of quantum encryption;
development in the field of quantum decryption; development
in the field of quantum-based telecommunication; development
in the field of single-photon based telecommunication;
development in the field of quantum cryptography;
development in the field of optics; validation and testing
of quantum-resistant algorithms.
59.
Apparatus and method for quantum enhanced physical layer security
Free-Space key distribution method comprising exchanging information between an emitter (100) and a receiver (200) based on the physical layer wiretap channel model, comprising the steps of randomly preparing (710), at the emitter (100), one qubit encoded with one of two possible non-identical quantum states, sending (720) the encoded qubit to the receiver (200) through a physical layer quantum-enhanced wiretap channel (500), such that an eavesdropper (300) tapping said channel is provided with partial information about the said states only, detecting and measuring (730) the received quantum states, key sifting (740) between the emitter and the receiver through a classical channel, calculating (750, 760) an amount of information available to any eavesdropper (300) based on the detected and received quantum states.
H04B 10/00 - Systèmes de transmission utilisant des ondes électromagnétiques autres que les ondes hertziennes, p. ex. les infrarouges, la lumière visible ou ultraviolette, ou utilisant des radiations corpusculaires, p. ex. les communications quantiques
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; encryption apparatus; electronic
encryption units; data encryption apparatus; computer
software for encryption; encoding apparatus; decoding
apparatus; encoding and decoding apparatus; integrated
circuit; circuit boards; electronic number generators;
decryption software; decryption apparatus; electronic
decryption units; data decryption apparatus; computer
software for decryption; quantum key generation software;
quantum key generation apparatus; quantum key distribution
software; quantum key distribution apparatus; random number
generator; photon counter; single-photon detector. Data encryption services; data decryption services; data
encryption and decoding services; encryption, decryption and
authentication of information, messages and data; design of
integrated circuits; design of electric circuit boards;
research relating to telecommunication techniques; research
in the field of information technology; research in the
field of telecommunications technology; research services in
the field of engineering; scientific research; computer
security services in the nature of administering digital
certificates; research in the field of quantum encryption;
research in the field of quantum decryption; research in the
field of quantum cryptography; research in the field of
quantum-based telecommunication; research in the field of
single-photon based telecommunication; research in the field
of optics; development in the field of quantum encryption;
development in the field of quantum decryption; development
in the field of quantum-based telecommunication; development
in the field of single-photon based telecommunication;
development in the field of quantum cryptography;
development in the field of optics; validation and testing
of quantum-resistant algorithms.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; encryption apparatus; electronic
encryption units; data encryption apparatus; computer
software for encryption; encoding apparatus; decoding
apparatus; encoding and decoding apparatus; integrated
circuit; circuit boards; electronic number generators;
decryption software; decryption apparatus; electronic
decryption units; data decryption apparatus; computer
software for decryption; quantum key generation software;
quantum key generation apparatus; quantum key distribution
software; quantum key distribution apparatus; random number
generator; photon counter; single-photon detector. Data encryption services; data decryption services; data
encryption and decoding services; encryption, decryption and
authentication of information, messages and data; design of
integrated circuits; design of electric circuit boards;
research relating to telecommunication techniques; research
in the field of information technology; research in the
field of telecommunications technology; research services in
the field of engineering; scientific research; computer
security services in the nature of administering digital
certificates; research in the field of quantum encryption;
research in the field of quantum decryption; research in the
field of quantum cryptography; research in the field of
quantum-based telecommunication; research in the field of
single-photon based telecommunication; research in the field
of optics; development in the field of quantum encryption;
development in the field of quantum decryption; development
in the field of quantum-based telecommunication; development
in the field of single-photon based telecommunication;
development in the field of quantum cryptography;
development in the field of optics; validation and testing
of quantum-resistant algorithms.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; encryption apparatus; electronic
encryption units; data encryption apparatus; computer
software for encryption; encoding apparatus; decoding
apparatus; encoding and decoding apparatus; electronic
number generators; decryption software; decryption
apparatus; electronic decryption units; data decryption
apparatus; computer software for decryption; quantum key
generation software; quantum key generation apparatus;
quantum key distribution software; quantum key distribution
apparatus; random number generator; photon counter;
single-photon detector. Data encryption services; data decryption services; data
encryption and decoding services; encryption, decryption and
authentication of information, messages and data; design of
integrated circuits; design of electric circuit boards;
research relating to telecommunication techniques; research
in the field of information technology; research in the
field of telecommunications technology; research services in
the field of engineering; scientific research; computer
security services in the nature of administering digital
certificates; research in the field of quantum encryption;
research in the field of quantum decryption; research in the
field of quantum cryptography; research in the field of
quantum-based telecommunication; research in the field of
single-photon based telecommunication; research in the field
of optics; development in the field of quantum encryption;
development in the field of quantum decryption; development
in the field of quantum-based telecommunication; development
in the field of single-photon based telecommunication;
development in the field of quantum cryptography;
development in the field of optics; validation and testing
of quantum-resistant algorithms.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; encryption apparatus; electronic
encryption units; data encryption apparatus; computer
software for encryption; encoding apparatus; decoding
apparatus; encoding and decoding apparatus; integrated
circuit; circuit boards; electronic number generators;
decryption software; decryption apparatus; electronic
decryption units; data decryption apparatus; computer
software for decryption; quantum key generation software;
quantum key generation apparatus; quantum key distribution
software; quantum key distribution apparatus; random number
generator; photon counter; single-photon detector. Data encryption services; data decryption services; data
encryption and decoding services; encryption, decryption and
authentication of information, messages and data; design of
integrated circuits; design of electric circuit boards;
research relating to telecommunication techniques; research
in the field of information technology; research in the
field of telecommunications technology; research services in
the field of engineering; scientific research; computer
security services in the nature of administering digital
certificates; research in the field of quantum encryption;
research in the field of quantum decryption; research in the
field of quantum cryptography; research in the field of
quantum-based telecommunication; research in the field of
single-photon based telecommunication; research in the field
of optics; development in the field of quantum encryption;
development in the field of quantum decryption; development
in the field of quantum-based telecommunication; development
in the field of single-photon based telecommunication;
development in the field of quantum cryptography;
development in the field of optics; validation and testing
of quantum-resistant algorithms.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; encryption apparatus; electronic
encryption units; data encryption apparatus; computer
software for encryption; encoding apparatus; decoding
apparatus; encoding and decoding apparatus; integrated
circuit; circuit boards; electronic number generators;
decryption software; decryption apparatus; electronic
decryption units; data decryption apparatus; computer
software for decryption; quantum key generation software;
quantum key generation apparatus; quantum key distribution
software; quantum key distribution apparatus; random number
generator; photon counter; single-photon detector. Data encryption services; data decryption services; data
encryption and decoding services; encryption, decryption and
authentication of information, messages and data; design of
integrated circuits; design of electric circuit boards;
research relating to telecommunication techniques; research
in the field of information technology; research in the
field of telecommunications technology; research services in
the field of engineering; scientific research; computer
security services in the nature of administering digital
certificates; research in the field of quantum encryption;
research in the field of quantum decryption; research in the
field of quantum cryptography; research in the field of
quantum-based telecommunication; research in the field of
single-photon based telecommunication; research in the field
of optics; development in the field of quantum encryption;
development in the field of quantum decryption; development
in the field of quantum-based telecommunication; development
in the field of single-photon based telecommunication;
development in the field of quantum cryptography;
development in the field of optics; validation and testing
of quantum-resistant algorithms.
65.
Method and apparatus for stabilizing quantum cryptographic key distribution
The present disclosure in some embodiments provides a method and an apparatus for providing a quantum cryptographic key distribution stabilization, which can quickly and efficiently compensate for an error caused by a temperature change, a change in polarization of a transmission path of an optical system included in a quantum cryptographic key distribution system in a cost-effective manner working perfectly with the very conventional quantum cryptographic key distribution system.
The invention relates to a QKD System Active combiner (200) adapted to be installed in a QKD apparatus, said QKD apparatus comprising an emitter (100), a receiver (110) and QKD systems (102/112), wherein the emitter (100) is adapted to send communication signals to the receiver (110) through the QKD System Active combiner (200), characterized in that the QKD System Active combiner (200) comprises an active attenuation system comprising a processing unit (230) adapted to automatically control at least one variable optical attenuator (150) through a control channel (290) in order to control an attenuation of a signal to be sent to the receiver, and a detector/monitor (240) adapted to monitor the intensity of the signal downstream the attenuation, and wherein the processing unit is adapted to control the variable optical attenuator (150) based on a QBER information or an intensity of a signal received by the receiver, sent by the QKD systems (112) through a classical channel (250).
H04B 10/079 - Dispositions pour la surveillance ou le test de systèmes de transmissionDispositions pour la mesure des défauts de systèmes de transmission utilisant un signal en service utilisant des mesures du signal de données
The present disclosure discloses a random number generating apparatus capable of equalizing the spatial intensity distribution of light signals that are radiated from a light resource and are input to individual pixels.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Computer software for use in the encryption of audio, video, text, still images, graphics and multimedia files; encryption apparatus, namely, computer hardware and computer software for use in the encryption of audio, video, text, still images, graphics and multimedia files; electronic encryption units; electronic data encryption units; encoding apparatus, namely, encoding machines for encoding of audio, video, text, still images, graphics and multimedia files; decoding apparatus, namely, decoding machines for decoding of audio, video, text, still images, graphics and multimedia files; encoding and decoding apparatus namely, encoding and decoding machines for encoding and decoding of audio, video, text, still images, graphics and multimedia files; integrated circuit; circuit boards; electronic number generators; computer software for use in the decryption of audio, video, text, still images, graphics and multimedia files; decryption apparatus, namely, computer hardware and computer software for use in the decryption of audio, video, text, still images, graphics and multimedia files; electronic decryption units; electronic data decryption units; quantum key generation software, namely, computer software for generating cryptographic keys for the purposes of encrypting and decrypting audio, video, text, still images, graphics and multimedia files; quantum key generation apparatus, namely, computer software and computer hardware for generating cryptographic keys for the purposes of encrypting and decrypting audio, video, text, still images, graphics and multimedia files; quantum key distribution software, namely, computer software for implementing a protocol for distributing quantum-based cryptographic keys over fibre optic cables, telephone lines, radio and microwave transmission, and satellite transmission; quantum key distribution apparatus, namely, computer software and computer hardware for implementing a protocol for distributing quantum-based cryptographic keys over fibre optic cables, telephone lines, radio and microwave transmission, and satellite transmission; random number generator; photon counter; single-photon detector. (1) Data encryption services; data decryption services; data encryption and decoding services; encryption, decryption and authentication of information, messages and data; design of integrated circuits; design of electric circuit boards; research relating to telecommunication techniques; research in the field of information technology; research in the field of telecommunications technology; research services in the field of engineering; scientific research in the field of data encryption, data decryption, data encoding and data decoding; computer security services in the nature of administering digital certificates; research in the field of quantum encryption; research in the field of quantum decryption; research in the field of quantum cryptography; research in the field of quantum-based telecommunication; research in the field of singlephoton based telecommunication; research in the field of optics; development in the field of quantum encryption; development in the field of quantum decryption; development in the field of quantum-based telecommunication; development in the field of single-photon based telecommunication; development in the field of quantum cryptography; development in the field of optics; validation and testing of quantum-resistant algorithms.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Quantum key generation software, namely, computer software for generating cryptographic keys for the purposes of encrypting and decrypting audio, video, text, still images, graphics and multimedia files; quantum key generation apparatus, namely, computer software and computer hardware for generating cryptographic keys for the purposes of encrypting and decrypting audio, video, text, still images, graphics and multimedia files; quantum key distribution software, namely, computer software for implementing a protocol for distributing quantum-based cryptographic keys over fibre optic cables, telephone lines, radio and microwave transmission, and satellite transmission; quantum key distribution apparatus, namely, computer software and computer hardware for distributing quantum-based cryptographic keys over fibre optic cables, telephone lines, radio and microwave transmission, and satellite transmission. (1) Data encryption services, data decryption services, data encryption and decoding services, encryption, decryption and authentication of information, messages and data, research in the field of quantum encryption, research in the field of quantum-based telecommunication, research in the field of single-photon based telecommunication, development in the field of quantum cryptography, validation and testing of quantum-resistant algorithms, all the foregoing services being related to the distribution of cryptographic keys.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
encryption apparatus, namely, computers and computer peripherals for data encryption, electronic encryption units; encoding apparatus; decoding apparatus; encoding and decoding apparatus; decryption apparatus, namely, computers and computer peripherals for data decryption , electronic decryption units; downloadable quantum key generation software; quantum key generation apparatus, namely, computers and computer peripherals for quantum key generation; downloadable quantum key distribution software; quantum key distribution apparatus, namely, computers and computer peripherals for quantum key distribution; random number generator, namely, computers and computer peripherals for random number generation, downloadable random number generation software Development in the nature of development of new products, development of quality control standards in the field of quantum decryption; development in the in the nature of development of new products, development of quality control standards in the field of quantum-based telecommunication; development in the nature of development of new products, development of quality control standards in the field of single-photon based telecommunication; development in the nature of development of new products, development of quality control standards in the field of quantum cryptography
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
(1) Computer software for use in the encryption of audio, video, text, still images, graphics and multimedia files; encryption apparatus, namely, computer hardware and computer software for use in the encryption of audio, video, text, still images, graphics and multimedia files; electronic encryption units; electronic data encryption units; encoding apparatus, namely, encoding machines for encoding of audio, video, text, still images, graphics and multimedia files; decoding apparatus, namely, decoding machines for decoding of audio, video, text, still images, graphics and multimedia files; encoding and decoding apparatus namely, encoding and decoding machines for encoding and decoding of audio, video, text, still images, graphics and multimedia files; integrated circuit; circuit boards; electronic number generators; computer software for use in the decryption of audio, video, text, still images, graphics and multimedia files; decryption apparatus, namely, computer hardware and computer software for use in the decryption of audio, video, text, still images, graphics and multimedia files; electronic decryption units; electronic data decryption units; quantum key generation software, namely, computer software for generating cryptographic keys for the purposes of encrypting and decrypting audio, video, text, still images, graphics and multimedia files; quantum key generation apparatus, namely, computer software and computer hardware for generating cryptographic keys for the purposes of encrypting and decrypting audio, video, text, still images, graphics and multimedia files; quantum key distribution software, namely, computer software for implementing a protocol for distributing quantum-based cryptographic keys over fibre optic cables, telephone lines, radio and microwave transmission, and satellite transmission; quantum key distribution apparatus, namely, computer software and computer hardware for implementing a protocol for distributing quantum-based cryptographic keys over fibre optic cables, telephone lines, radio and microwave transmission, and satellite transmission; random number generator; photon counter; single-photon detector. (1) Data encryption services; data decryption services; data encryption and decoding services; encryption, decryption and authentication of information, messages and data; design of integrated circuits; design of electric circuit boards; research relating to telecommunication techniques; research in the field of information technology; research in the field of telecommunications technology; research services in the field of engineering; scientific research in the field of data encryption, data decryption, data encoding and data decoding; computer security services in the nature of administering digital certificates; research in the field of quantum encryption; research in the field of quantum decryption; research in the field of quantum cryptography; research in the field of quantum-based telecommunication; research in the field of singlephoton based telecommunication; research in the field of optics; development in the field of quantum encryption; development in the field of quantum decryption; development in the field of quantum-based telecommunication; development in the field of single-photon based telecommunication; development in the field of quantum cryptography; development in the field of optics; validation and testing of quantum-resistant algorithms.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
encryption apparatus, namely, computers and computer peripherals for data encryption, electronic encryption units; encoding apparatus; decoding apparatus; encoding and decoding apparatus; decryption apparatus, namely, computers and computer peripherals for data decryption , electronic decryption units; downloadable quantum key generation software; quantum key generation apparatus, namely, computers and computer peripherals for quantum key generation; downloadable quantum key distribution software; quantum key distribution apparatus, namely, computers and computer peripherals for quantum key distribution; random number generator, namely, computers and computer peripherals for random number generation, downloadable random number generation software Development in the nature of development of new products, development of quality control standards in the field of quantum decryption; development in the in the nature of development of new products, development of quality control standards in the field of quantum-based telecommunication; development in the nature of development of new products, development of quality control standards in the field of single-photon based telecommunication; development in the nature of development of new products, development of quality control standards in the field of quantum cryptography
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
encryption apparatus, namely, computers and computer peripherals for data encryption, electronic encryption units; encoding apparatus; decoding apparatus; encoding and decoding apparatus; decryption apparatus, namely, computers and computer peripherals for data decryption , electronic decryption units; downloadable quantum key generation software; quantum key generation apparatus, namely, computers and computer peripherals for quantum key generation; downloadable quantum key distribution software; quantum key distribution apparatus, namely, computers and computer peripherals for quantum key distribution; random number generator, namely, computers and computer peripherals for random number generation, downloadable random number generation software Development in the nature of development of new products, development of quality control standards in the field of quantum decryption; development in the in the nature of development of new products, development of quality control standards in the field of quantum-based telecommunication; development in the nature of development of new products, development of quality control standards in the field of single-photon based telecommunication; development in the nature of development of new products, development of quality control standards in the field of quantum cryptography
The present relates to a QKD receiver (300-700) comprising an optical system (110), at least two detectors (120, 130, 220 230), a processing unit (140) and a buffer (170, 270), characterized in that the buffer (170, 270) is adapted to temporarily store an information that the receiver (300-700) sends back to the emitter via a service channel once one of the detectors receives quantum data,, so as to introduce a delay time into the communication process to assure that the communication restarts only after a deadtime of all the detectors (120, 130) has lapsed.
The present invention relates to a measuring device (3000) for measuring reflection in an optical fiber (1400), the device comprising: emitting means (3100) connected to the optical fiber (1400) and configured to emit light into the optical fiber (1400), measuring means (3300) connected to the optical fiber (1400) and configured to receive a reflected light from the optical fiber (1400), wherein the measuring means comprises a first photon detector (3310) and a second photon detector (3311), wherein the operation of the second photon detector (3311) and/or the reflected light reaching the second photon detector (3311) is controlled based on an output of the first photon detector (3310).
The present invention relates to a receiver (2200) for recognizing blinding attacks in a quantum encrypted channel (1300) comprising an optical fiber, comprising a multipixel detector (2210) comprising a plurality of pixels, and configured to be illuminated by a light beam outputted by the optical fiber, and a processing unit (2220) connected to the multipixel detector (2210) and configured to determine the presence of a blinding attack if a predetermined number of pixels detects light within a predetermined interval. The invention further relates to the use of the receiver (2200) for recognizing blinding attacks in a quantum encrypted channel (1300) and to a method for recognizing blinding attacks in a quantum encrypted channel (1300).
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; Encryption apparatus; Electronic encryption units; Data encryption apparatus; Computer software for encryption; Encoding apparatus; Decoding apparatus; Encoding and decoding apparatus; Integrated circuit; Circuit boards; Electronic number generators; Decryption software; Decryption apparatus; Electronic decryption units; Data decryption apparatus; Computer software for decryption; Quantum key generation software; Quantum key generation apparatus; Quantum key distribution software; Quantum key distribution apparatus; Random number generator; Photon counter; Single-photon detector. Data encryption services; Data decryption services; Data encryption and decoding services; Encryption, decryption and authentication of information, messages and data; Design of integrated circuits; Design of electric circuit boards; Research relating to telecommunication techniques; Research in the field of information technology; Research in the field of telecommunications technology; Research services; Scientific research; Computer security services in the nature of administering digital certificates; Research in the field of quantum encryption; Research in the field of quantum decryption; Research in the field of quantum cryptography; Research in the field of quantum-based telecommunication; Research in the field of single-photon based telecommunication; Research in the field of optics; Development in the field of quantum encryption; Development in the field of quantum decryption; Development in the field of quantum-based telecommunication; Development in the field of single-photon based telecommunication; Development in the field of quantum cryptography; Development in the field of optics; Validation and testing of quantum-resistant algorithms.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; Encryption apparatus; Electronic encryption units; Data encryption apparatus; Computer software for encryption; Encoding apparatus; Decoding apparatus; Encoding and decoding apparatus; Integrated circuit; Circuit boards; Electronic number generators; Decryption software; Decryption apparatus; Electronic decryption units; Data decryption apparatus; Computer software for decryption; Quantum key generation software; Quantum key generation apparatus; Quantum key distribution software; Quantum key distribution apparatus; Random number generator; Photon counter; Single-photon detector. Data encryption services; Data decryption services; Data encryption and decoding services; Encryption, decryption and authentication of information, messages and data; Design of integrated circuits; Design of electric circuit boards; Research relating to telecommunication techniques; Research in the field of information technology; Research in the field of telecommunications technology; Research services; Scientific research; Computer security services in the nature of administering digital certificates; Research in the field of quantum encryption; Research in the field of quantum decryption; Research in the field of quantum cryptography; Research in the field of quantum-based telecommunication; Research in the field of single-photon based telecommunication; Research in the field of optics; Development in the field of quantum encryption; Development in the field of quantum decryption; Development in the field of quantum-based telecommunication; Development in the field of single-photon based telecommunication; Development in the field of quantum cryptography; Development in the field of optics; Validation and testing of quantum-resistant algorithms.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; Encryption apparatus; Electronic encryption units; Data encryption apparatus; Computer software for encryption; Encoding apparatus; Decoding apparatus; Encoding and decoding apparatus; Electronic number generators; Decryption software; Decryption apparatus; Electronic decryption units; Data decryption apparatus; Computer software for decryption; Quantum key generation software; Quantum key generation apparatus; Quantum key distribution software; Quantum key distribution apparatus; Random number generator; Photon counter; Single-photon detector. Data encryption services; Data decryption services; Data encryption and decoding services; Encryption, decryption and authentication of information, messages and data; Design of integrated circuits; Design of electric circuit boards; Research relating to telecommunication techniques; Research in the field of information technology; Research in the field of telecommunications technology; Research services; Scientific research; Computer security services in the nature of administering digital certificates; Research in the field of quantum encryption; Research in the field of quantum decryption; Research in the field of quantum cryptography; Research in the field of quantum-based telecommunication; Research in the field of single-photon based telecommunication; Research in the field of optics; Development in the field of quantum encryption; Development in the field of quantum decryption; Development in the field of quantum-based telecommunication; Development in the field of single-photon based telecommunication; Development in the field of quantum cryptography; Development in the field of optics; Validation and testing of quantum-resistant algorithms.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Quantum key generation software; Quantum key generation apparatus; Quantum key distribution software; Quantum key distribution apparatus. Data encryption services; Data decryption services; Data encryption and decoding services; Encryption, decryption and authentication of information, messages and data; Research in the field of quantum encryption; Research in the field of quantum-based telecommunication; Research in the field of single-photon based telecommunication; Development in the field of quantum cryptography; Validation and testing of quantum-resistant algorithms; all these services being related to the distribution of quantum keys.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; Encryption apparatus; Electronic encryption units; Data encryption apparatus; Computer software for encryption; Encoding apparatus; Decoding apparatus; Encoding and decoding apparatus; Integrated circuit; Circuit boards; Electronic number generators; Decryption software; Decryption apparatus; Electronic decryption units; Data decryption apparatus; Computer software for decryption; Quantum key generation software; Quantum key generation apparatus; Quantum key distribution software; Quantum key distribution apparatus; Random number generator; Photon counter; Single-photon detector. Data encryption services; Data decryption services; Data encryption and decoding services; Encryption, decryption and authentication of information, messages and data; Design of integrated circuits; Design of electric circuit boards; Research relating to telecommunication techniques; Research in the field of information technology; Research in the field of telecommunications technology; Research services; Scientific research; Computer security services in the nature of administering digital certificates; Research in the field of quantum encryption; Research in the field of quantum decryption; Research in the field of quantum cryptography; Research in the field of quantum-based telecommunication; Research in the field of single-photon based telecommunication; Research in the field of optics; Development in the field of quantum encryption; Development in the field of quantum decryption; Development in the field of quantum-based telecommunication; Development in the field of single-photon based telecommunication; Development in the field of quantum cryptography; Development in the field of optics; Validation and testing of quantum-resistant algorithms.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Encryption software; Encryption apparatus; Electronic encryption units; Data encryption apparatus; Computer software for encryption; Encoding apparatus; Decoding apparatus; Encoding and decoding apparatus; Integrated circuit; Circuit boards; Electronic number generators; Decryption software; Decryption apparatus; Electronic decryption units; Data decryption apparatus; Computer software for decryption; Quantum key generation software; Quantum key generation apparatus; Quantum key distribution software; Quantum key distribution apparatus; Random number generator; Photon counter; Single-photon detector. Data encryption services; Data decryption services; Data encryption and decoding services; Encryption, decryption and authentication of information, messages and data; Design of integrated circuits; Design of electric circuit boards; Research relating to telecommunication techniques; Research in the field of information technology; Research in the field of telecommunications technology; Research services; Scientific research; Computer security services in the nature of administering digital certificates; Research in the field of quantum encryption; Research in the field of quantum decryption; Research in the field of quantum cryptography; Research in the field of quantum-based telecommunication; Research in the field of single-photon based telecommunication; Research in the field of optics; Development in the field of quantum encryption; Development in the field of quantum decryption; Development in the field of quantum-based telecommunication; Development in the field of single-photon based telecommunication; Development in the field of quantum cryptography; Development in the field of optics; Validation and testing of quantum-resistant algorithms.
83.
FILTER FOR ION TRAP DEVICE AND DESIGNING METHOD THEREFOR
SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION (République de Corée)
Inventeur(s)
Kwon, Yeongdae
Kim, Taehyun
Cho, Dong Il
Lee, Minjae
Hong, Seokjun
Abrégé
Embodiments of the present invention provide a filter for an ion trap device and a designing method therefor, wherein, a conventional RC filter is used, in which an electric field decreases in inverse proportion to the magnitude of capacitance of a capacitor included in the RC filter, and additionally electric fields in opposite directions induced by RF coupling are offset, so that micro vibrations occurring in an ion are suppressed and the degree of integration of an ion trap can be thus increased.
SEOUL NATIONAL UNIVERSITY R&DB FOUNDATION (République de Corée)
Inventeur(s)
Kwon, Yeongdae
Kim, Taehyun
Cho, Dongil
Park, Yunjae
Lee, Minjae
Abrégé
Provided in embodiments of the present invention are an ion trap electrode forming method, and a device using the same, the method being capable of: using an entire electrode region as an object to be optimized since the number of outermost vertices of an electrode, positions thereof, and the like is unrestricted; preventing heating of ions and lifespan deterioration; and optimizing a junction electrode structure that can be utilized for the manufacturing of an ion trap chip for quantum computer and quantum communication implementation.
The present invention relates to an encryption unit (3200) for encrypting at least one packet (P1, P2) according to a predetermined cryptographic protocol, wherein the predetermined cryptographic protocol requires exchanging of service channel information, wherein the service channel information has a first bit length, the encryption unit comprising: a packet analyzer (3210) configured to recognize whether the packet (P1, P2) has unused bits, a packet builder (3220) configured to insert the service channel information in the packet (P1, P2) if the number of unused bits is equal to or larger than the first bit length, and an encryption engine (3230) configured to encrypt the packet (P1, P2) according to the predetermined cryptographic protocol.
G09C 1/00 - Appareils ou méthodes au moyen desquels une suite donnée de signes, p. ex. un texte intelligible, est transformée en une suite de signes inintelligibles en transposant les signes ou groupes de signes ou en les remplaçant par d'autres suivant un système préétabli
H04L 12/801 - Commande de flux ou commande de congestion
86.
Device and method for managing performance of quantum noise-based random number generator
The present invention presents a device and method for managing the performance of a quantum noise-based random number generator, the device ensuring the performance stability of a random number generator on the basis of an output value for each pixel, which is outputted in correspondence to an optical strength value of an optical signal emitted from a light source and inputted into each pixel, so as to be capable of outputting, within a certain range regardless of devices, a value of an entropic signal outputted from an image sensor, thereby enabling sufficient randomness to be continuously maintained while minimizing deviation between pixels.
G06F 7/58 - Générateurs de nombres aléatoires ou pseudo-aléatoires
G01J 1/20 - Photométrie, p. ex. posemètres photographiques par comparaison avec une lumière de référence ou avec une valeur électrique de référence l'intensité de la valeur mesurée ou de référence étant modifiée jusqu' à égalisation de leurs effets au niveau du détecteur, p. ex. en faisant varier l'angle d'incidence
Embodiments of the present invention provide a quantum key distribution stabilization device and method, which can quickly and efficiently compensate for an error occurring because of a temperature change, a polarization change of a transmission path, and the like in an optical system included in a quantum key distribution system, and can reduce costs since a conventional quantum key distribution system can be applied as is.
The present invention relates to a measuring device (3000) for measuring reflection in an optical fiber (1400), the device comprising: emitting means (3100) connected to the optical fiber (1400) and configured to emit light into the optical fiber (1400), measuring means (3300) connected to the optical fiber (1400) and configured to receive a reflected light from the optical fiber (1400), wherein the measuring means comprises a first photon detector (3310) and a second photon detector (3311), wherein the operation of the second photon detector (3311) and/or the reflected light reaching the second photon detector (3311) is controlled based on an output of the first photon detector (3310).
G01M 11/00 - Test des appareils optiquesTest des structures ou des ouvrages par des méthodes optiques, non prévu ailleurs
G01D 5/353 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensibleMoyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminéTransducteurs non spécialement adaptés à une variable particulière utilisant des moyens optiques, c.-à-d. utilisant de la lumière infrarouge, visible ou ultraviolette avec atténuation ou obturation complète ou partielle des rayons lumineux les rayons lumineux étant détectés par des cellules photo-électriques en modifiant les caractéristiques de transmission d'une fibre optique
89.
APPARATUS AND METHOD FOR ENHANCING SECRET KEY RATE EXCHANGE OVER QUANTUM CHANNEL IN QUANTUM KEY DISTRIBUTIONSYSTEMS
An apparatus for enhancing secret key rate exchange over quantum channel in QKD systems comprises an emitter system (105) with a quantum emitter (140) and a receiver system (205) with a quantum receiver (240). Emitter system (105) and the receiver system (205) are connected by a quantum channel (600) and a service communication channel (500). User interfaces (120, 220) within the emitter and the receiver systems (105, 205) allow to define a first quantum channel loss budget (tC-D) based on the distance to be covered between the quantum emitter (140) and the quantum receiver (240) and the infrastructure properties of the quantum channel (600) as well as a second quantum channel loss budget (tA-C), wherein the second quantum channel loss budget (tA-C) is associated to the loss within the realm of the emitter system (105). The emitter system (105) is adapted to define the optimal mean number of photons of coherent states to be emitted based on the first and the second quantum channel loss budgets.
Title: APPARATUS AND METHOD FOR QUANTUM ENHANCED PHYSICAL LAYER SECURITY Abstract: Free-Space key distribution method comprising exchanging information between an emitter (100) and a receiver (200) based on the physical layer wiretap channel model, comprising the steps of randomly preparing (710), at the emitter (100), one qubit encoded with one of two possible non-identical quantum states, sending (720) the encoded qubit to the receiver (200) through a physical layer quantum-enhanced wiretap channel (500), such that an eavesdropper (300) tapping said channel is provided with partial informa¬ tion about the said states only, detecting and measuring (730) the received quantum states, key sifting (740) between the emitter and the receiver through a classical channel, calculating (750, 760) an amount of information available to any eavesdropper (300) based on the detected and received quantum states.
Free-Space key distribution method comprising exchanging information between an emitter (100) and a receiver (200) based on the physical layer wiretap channel model, comprising the steps of randomly preparing (710), at the emitter (100), one qubit encoded with one of two possible non-identical quantum states, sending (720) the encoded qubit to the receiver (200) through a physical layer quantum-enhanced wiretap channel (500), such that an eavesdropper (300) tapping said channel is provided with partial information about the said states only, detecting and measuring (730) the received quantum states, key sifting (740) between the emitter and the receiver through a classical channel, calculating (750, 760) an amount of information available to any eavesdropper (300) based on the detected and received quantum states.
Apparatus and method for the detection of attacks taking control of the single photon detectors of a quantum cryptography apparatus by randomly changing their efficiency
An apparatus and method for revealing both attack attempts performed on the single-photon detector(s) of a quantum cryptography system and Trojan horse attack attempts performed on quantum cryptography apparatus containing at least one single photon detector. The attacks detection relies on both the random modification of the setting parameters of the said single-photon detector(s) and the comparison of the measured detection probability values for each setting parameter with the expected detection probability values. The modified parameter of the single-photon detector can be its efficiency or its timing of activation for example.
The invention relates to a QKD System Active combiner (200) adapted to be installed in a QKD apparatus, said QKD apparatus comprising an emitter (100), a receiver (110) and QKD systems (102/112), wherein the emitter (100) is adapted to send communication signals to the receiver (110) through the QKD System Active combiner (200), characterized in that the QKD System Active combiner (200) comprises an active attenuation system comprising a processing unit(230) adapted to automatically control at least one variable optical attenuator (150) through a control channel (290) in order to control an attenuation of a signal to be sent to the receiver, and a detector/monitor(240) adapted to monitor the intensity of the signal downstream the attenuation, and wherein the processing unit is adapted to control the variable optical attenuator (150) based on a QBER information or an intensity of a signal received by the receiver, sent by the QKD systems (112) through a classical channel (250).
Some embodiments provide methods and apparatus for quantum random number generation based on a single bit or multi bit Quanta Image Sensor (QIS) providing single-photon counting over a time interval for each of an array of pixels of the QIS, wherein random number data is generated based on the number of photons counted over the time interval for each of the pixels.
A method and apparatus for synchronizing a start-point of quantum data are disclosed. A method of determining a start-point of a quantum key distribution (QKD) protocol, at which a receiving apparatus of a QKD system starts the QKD protocol with a transmitting apparatus, includes receiving, by the receiving apparatus, an optical pulse sequence of a predetermined pattern from the transmitting apparatus, measuring, by the receiving apparatus, a predetermined quantum signal included in the optical pulse sequence, transmitting, by the receiving apparatus, a confirmation signal to the transmitting apparatus when the number of measurements of the predetermined quantum signal reaches a predetermined value, and determining, as the start-point, a point after one period of the optical pulse sequence from a point at which the number of measurements of the predetermined quantum signal has reached the predetermined value, or a point at which the confirmation signal has been transmitted.
The present disclosure in some embodiments provides an apparatus and method for supplying quantum keys to multiple apparatuses in a quantum key distribution system. According to some embodiments of the present disclosure, an apparatus and method for supplying quantum keys enable Alice or Bob to deliver the quantum keys to the multiple transmitting apparatuses or receiving apparatuses, in real time without a delay.
A QKD system used to securely exchange encryption keys between an emitter (100) and a receiver (200) modified to accept an additional customization parameter. Said QKD system consists of a QKD transmitter (120) and a QKD receiver (220) capable of implementing a plurality of QKD protocols forming a family of protocols. The QKD transmitter (120) and receiver (220) connected through a quantum channel (500) consist of optical and electronic components adapted to produce and detect a stream of qubits. The qubits (520) exchanged over the quantum channel (500) are grouped into blocks (510) consisting of at least one qubit and whose length is Li (511). For each, block (510) of qubits (520), one of the QKD protocol (530), selected from the family of protocols can be implemented using the emitter (100) and transmitter (200) is used.
The invention relates to a Quantum Key Distribution apparatus (200), for exchanging at least one quantum key with another Quantum Key Distribution apparatus, comprising a Random Number Generator (110) for generating a random bit signal, an electronic driver (140) for transforming a digital signal into an analog signal, an optical platform (150), receiving the signal from the driver, for exchanging, through a quantum channel (170), said quantum key, a clock (120) for synchronizing the working of the QKD apparatus, characterized in that said apparatus comprises an External Random Number Generator input adapted to receive an external random bit generated by an External Random Number Generator (220) connected to said Quantum Key Distribution apparatus, a RNG mixer (210) for receiving outputs from the Random Number Generator and the External Random Number Generator input and generating a random bit signal based on the combination of said outputs, said RNG mixer being disposed downstream the processing unit.
A reconfigurable and timely accurate method of generating, with a low latency, an output signal in response to multiple input signals, wherein said input signals occur at independent times, and wherein the occurrence of several input signals according to predetermined pattern is interpreted as a Super Event and wherein a detected Super Event triggers the production of a specific output signal heralding this Super Event, characterized in that said method comprises a first step of time acquisition of the occurrence of said input signals, a second step of adaptation of the acquisition data flow to the clock of the reconfigurable processing unit, a third step of determining the occurrence of a Super Event by comparing the events pattern to the super event definition, a fourth step identifying the Super Event and generating at least one event/signal corresponding to at least one trigger signal, a fifth step of adaptation of the generation data flow to the asynchronous generation device, a sixth step of applying a predefined delay for the issue of the at least one trigger signal, and an seventh step of outputting at least one output signal representing a trigger signal and sending it to a downstream unit.
H04B 10/079 - Dispositions pour la surveillance ou le test de systèmes de transmissionDispositions pour la mesure des défauts de systèmes de transmission utilisant un signal en service utilisant des mesures du signal de données
H04B 10/071 - Dispositions pour la surveillance ou le test de systèmes de transmissionDispositions pour la mesure des défauts de systèmes de transmission utilisant un signal réfléchi, p. ex. utilisant des réflectomètres optiques temporels [OTDR]
100.
Method and device for optics based quantum random number generation
A method and device for generating random numbers based on an optical process of quantum nature. According to one exemplary aspect, the method includes randomly emitting photons from a light source and absorbing the emitted photons by a photon sensor having a plurality of pixels. Furthermore, respective minimum entropy levels can be calculated for each of the pixels of the photon sensor and a randomness extractor can be associated with each of pixels based on the calculated minimum entropy level of that pixel. After this calibration, the method and device generates a number of high-entropy bits used for generating a random number.
