Key stream cipher device

Details Key stream cipher device Key stream cipher device

2006-05-09

2006-05-09

Morse, Gregory (Department: 2134)

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

C380S037000, C380S043000

Reexamination Certificate

active

07043017

ABSTRACT:
A symmetric key stream processor60that encrypts and decrypts text in accordance with the RC4 algorithm has a main processing block62and a host interface64. The main processing block62includes an Sbox memory78implemented with a synchronous dual-port RAM and an encryption logic block80with a finite state machine. The dual port memory architecture is used for efficiency during permutation and message processing.

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Schneier, “Applied Cryptography,” 1996, pp. 397-398.

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