Cryptography – Key management – Having particular key generator
Patent
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.
Erbes Norbert
Rother Dietrich
ALCATEL N.V.
Cangialosi Salvatore
Lewis Aaron J.
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