Cryptography – Communication system using cryptography – Data stream/substitution enciphering
Patent
1993-03-12
1994-11-15
Cain, David C.
Cryptography
Communication system using cryptography
Data stream/substitution enciphering
380 49, 380 50, H04L 900
Patent
active
053655885
ABSTRACT:
A general purpose, high-speed encryption system and method, based on a linear feedback shift register (LFSR) that provides inputs to one or more mathematically independent nonlinear output functions, resulting in the generation of multiple keystream outputs per clock cycle. Due to the parallel architecture, the system need only operate at a rate of 1/N, where N is the number of output functions. For example, the system can encrypt an 8-bit byte in one-eighth the time required for a conventional bit-oriented stream cipher. Alternatively, with high-speed serial-to-parallel and parallel-to-serial interface converters, the system can encrypt a serial data stream at a rate N times that of the system itself.
REFERENCES:
patent: 4202051 (1980-05-01), Davida et al.
patent: 4663500 (1987-05-01), Okamoto et al.
patent: 4965881 (1990-10-01), Dilley
patent: 5048086 (1991-09-01), Bianco et al.
patent: 5054067 (1991-10-01), Moroney et al.
patent: 5060265 (1991-10-01), Finkelstein
patent: 5148485 (1992-09-01), Dent
patent: 5191610 (1993-03-01), Hill et al.
patent: 5195136 (1993-03-01), Hardy et al.
patent: 5208853 (1993-05-01), Armbruster et al.
"Characterizations of Generators for Modified de Bruijn Sequences," G. L. Mayhew, S. W. Golomb, Advances in Applied Mathematics 13, 454-461 (1992).
"On the Classification of Balanced Binary Sequences of Period 2.sup.n -1;" S. W. Golomb, IEEE Transactions on Information Theory, vol. 26, No. 6, Nov. 1980.
"A Source of Cryptographically Strong Permutations for Use in Block Ciphers," L. Mittenthal, Proceedings of the 1993 IEEE International Symposium on Information Theory.
Bianco Mark E.
Mayhew Gregory L.
Cain David C.
Denson-Low W. K.
Hughes Aircraft Company
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