Random coding cipher system and method

Details Random coding cipher system and method Random coding cipher system and method

H - Electricity

04

L

H04L 9/22 (2006.01) H04L 9/12 (2006.01) H04L 9/18 (2006.01)

Patent

CA 2144951

In a random coding cipher system and method, a sender and receiver pair share a long string of random digits, the masking tape. To encrypt a plaintext message, the sender generates a random integer (using a pseudo-random number generator, RNG) or a pseudo-random integer (using a pseudo-random number generator, PRNG). This is the initializing integer. The sender then selects an integer formed from a subset of the digits of the initializing integer. This is the starting integer for the message. The method of formation of the starting integer (choice of position of the digits and their ordering, etc.) from the digits of the initializing integer is shared by sender and receiver. The starting integer determines a starting, or indexing, position in the masking tape for extraction of a sequence of blocks of digits, of common length, to be put in one-to-one correspondence with the characters of the plain-text alphabet used for communication. The integer blocks comprise the numerical synonyms for the plaintext alphabet characters.

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