System for encrypted information transmission

Details System for encrypted information transmission System for encrypted information transmission

1986-05-20

1988-07-12

Cangialosi, Salvatore

Cryptography

Key management

Having particular key generator

380 44, 380 28, H04L 900

Patent

active

047575352

ABSTRACT:
A system for encrypted information transmission is disclosed in which so-called recording interference is suppressed. Encryption is effected by means of a periodically recurring pseudo-noise sequence (key word). Synchronization between transmitter and receiver is produced by means of a sync word. During the period of validity of the key word, each sync word is used only once. At least the sync words already used or the information derived therefrom are stored in a sync-word memory (SP). If a sync word appears twice, this indicates recording interference, and the associated information is suppressed.

REFERENCES:
patent: 3949397 (1976-04-01), Wagner et al.
patent: 4434322 (1984-02-01), Ferrell
patent: 4484027 (1984-11-01), Lee et al.

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