Method of modifying pseudo-random sequences and device for scram

Details Method of modifying pseudo-random sequences and device for scram Method of modifying pseudo-random sequences and device for scram

1993-07-06

1994-09-27

Cain, David C.

Cryptography

Key management

Having particular key generator

380 49, 380 50, 364717, H04L 900

Patent

active

053513002

ABSTRACT:
For dynamically modifying pseudo-random sequences of a pseudo-random sequence generator which is re-initialized at each start of the packet of information components, the information component itself is derived, delayed and combined with one of the series of bits present in the pseudo-random sequence generator. After having delayed the derived information component by a given delay (20), the component is modified by passing it through an EXCLUSIVE-OR gate (23) and by delaying the output signal of said gate with a delay (21) equal to that (20) used for said derived information component, and by feeding it back to the input of the gate.

REFERENCES:
patent: 4023026 (1977-05-01), O'Farrell
patent: 4785410 (1988-11-01), Hamatsu et al.
patent: 4845654 (1989-07-01), Harada et al.
patent: 4864525 (1989-09-01), Kurihara et al.
patent: 5079733 (1992-01-01), Antoine et al.
"Specification of the D2-MAC/packet System", 1985, pp. 141-166.

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