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2026
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G/S
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downloadable or recorded computer application software for blockchain-based platforms, namely, so... |
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2023
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Invention
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Method for providing user identity based on zero-knowledge proof over blockchain network by using... |
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2022
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Invention
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Method for providing oracle service of blockchain network by using zero-knowledge proof and aggre... |
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Invention
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Method for issuing, redeeming, refunding, settling and revoking electronic voucher by using utxo-... |
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2021
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Invention
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Method for paying cost of iot device based on blockchain and merkle tree structure related theret... |
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Invention
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Method for authenticating user contactlessly based on decentralized identifier using verifiable c... |
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Invention
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Certificate issuing system based on block chain. The present invention provides a certificate iss... |
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Invention
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Tampering verification system and method for financial institution certificates, based on blockch... |
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Invention
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Method and server for providing notary service for file and verifying file recorded by notary ser... |
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Invention
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Method for providing authentication service by using decentralized identity and server using the ... |
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2020
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Invention
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Blockchain network-based virtual common id service method and service provision server using same... |
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Invention
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Zero-knowledge proof-based certificate service method using blockchain network, certification sup... |
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G/S
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Downloadable software for managing cryptocurrency transactions using blockchain technology; Downl... |
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Invention
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Method for providing relational decentralized identifier service and blockchain node using the sa... |
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Invention
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Method for providing virtual asset service based on decentralized identifier and virtual asset se... |
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Invention
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Method for providing online ticket service by using blockchain network and server using the same.... |
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2019
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Invention
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Method and server for providing notary service with respect to file and verifying file recorded b... |
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Invention
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Method for approving use of card by using blockchain-based token id and server using method. The ... |
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Invention
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Method for managing document on basis of blockchain by using utxo-based protocol, and document ma... |
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Invention
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Method for providing simplified account registration service and user authentication service, and... |
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Invention
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Method for superseding log-in of user through pki-based authentication by using smart contact and... |
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Invention
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Method for superseding log-in of user through pki-based authentication by using blockchain databa... |
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Invention
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Method for providing payment gateway service using utxo-based protocol and server using same. The... |
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Invention
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Method and server for authenticating and verifying file. Provided is a method according to one em... |
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Invention
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Method and service-providing server for secure transmission of user-authenticating information. A... |
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Invention
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Method for issuing currency and making payment by managing balance database for each block in blo... |
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Invention
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Method for issuing currency and making payment using utxo-based protocol and server using same. T... |
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Invention
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Method for sso service using pki based on blockchain networks, and device and server using the sa... |
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Invention
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Method for oauth service through blockchain network, and terminal and server using the same. A me... |
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G/S
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Downloadable mobile software applications for managing, storing and securing personal information... |
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Invention
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Method for managing information using tree structure based on blockchain, server and terminal usi... |
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2018
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Invention
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System for authenticating certificate based on blockchain network, and method for authenticating ... |
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Invention
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System for issuing certificate based on blockchain network, and method for issuing certificate ba... |
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Invention
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Tampering verification system and method for financial institution certificates based on blockcha... |
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Invention
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Secure information transmitting system and method for personal identity authentication. A secure ... |
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Invention
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System for issuing public certificate on basis of block chain, and method for issuing public cert... |
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Invention
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Method for paying cost of iot device based on blockchain, and server, service providing device, a... |
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G/S
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[ Business supervision of payment operations and of computer payment systems; Business administra... |
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2017
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Invention
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Method for providing united point service in use of unspent transaction output based protocol and... |
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Invention
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Method for providing united point service using updated status of balance database with blockchai... |
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Invention
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System and method for verifying forgery of financial institution proof documents on basis of bloc... |
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Invention
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Method for providing recording and verification service for data received and transmitted by mess... |
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2016
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Invention
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Method and server for authenticating and verifying file. Provided is a method according to the pr... |
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Invention
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Accredited certificate issuance system based on block chain and accredited certificate issuance m... |
