A method for the interception-proof transmission of at least one cryptographic parameter from a user to an encrypted offline storage medium, comprising steps of: cloaking an upward portion of a substrate with an upper plate, characterized in that said upper plate comprises a multitude of indicia, wherein each indicium has a corresponding manipulation indicator; sequentially positioning a manipulation apparatus over one or more of the manipulation indicators; mechanically manipulating the substrate, after each sequential positioning of the manipulation apparatus, using said manipulation apparatus, characterized in that the manipulation indicator of the desired indicium overlaps with one mechanical manipulation unit of the substrate; and deconstructing said substrate in two or more complementary units, characterized in that said complementary units each comprises at least one mechanical manipulation unit administered by the manipulation apparatus.
G09C 1/00 - Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
G09C 1/02 - Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system by using a ciphering code in chart form
G09C 1/04 - Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system with sign carriers or indicators moved relative to one another to positions determined by a permutation code or key, so as to indicate the appropriate corresponding clear or ciphered text
G09C 1/14 - Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system wherein elements corresponding to the signs making up the clear text are operatively connected with elements corresponding to the signs making up the ciphered text, the connections, during operation of the apparatus, being automatically and continuously permuted by a coding or key member involving removable or interchangeable coding numbers, e.g. master tapes, punched cards
G09C 5/00 - Ciphering or deciphering apparatus or methods not provided for in other groups of this subclass, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages
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