Cipher

Details Cipher Cipher

2006-07-11

2006-07-11

Vu, Kim (Department: 2135)

Cryptography

Communication system using cryptography

Time segment interchange

C380S036000, C380S037000, C703S013000, C703S014000, C708S200000

Reexamination Certificate

active

07076060

ABSTRACT:
A cipher for enciphering and deciphering a signal includes a plurality of sequentially coupled cipher units, each cipher unit being operable to carry out a reversible operation on the signal. The couplings between cipher units can be randomly configured using a cipher code. The cipher code can be secretly shared between the encipher and decipher. A signal which is enciphered using this technique is thus deciphered using a randomly selected cipher circuit as described by the cipher code.

REFERENCES:
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patent: 4984271 (1991-01-01), Goto
patent: 0267647 (1988-05-01), None
patent: WO 89/07375 (1989-08-01), None
Patent Abstracts of Japan, vol. 107, No. 456 (E-1418), Aug. 20, 1993, & JP 05 102960 A (NEC Corp), Apr. 23, 1993.
Nandi et al, “Theory and Applications of Cellular Automata In Cryptography”, IEEE Transactions on Computers, New York, vol. 43, No. 12, Dec. 1, 1994, pp. 1346-1356, XP000484159.

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