Electronic keying scheme for locking data

Details Electronic keying scheme for locking data Electronic keying scheme for locking data

1988-02-18

1990-07-24

Tarcza, Thomas H.

Cryptography

Key management

Having particular key generator

380 23, 380 25, H03K 102

Patent

active

049440080

ABSTRACT:
A data locking system which modifies data in accordance with a renewable key variable derived from the exclusive ORing of a pseudorandom combination number from an external source means with an altered key variable.

REFERENCES:
patent: 4193131 (1980-03-01), Lennon et al.
patent: 4213118 (1980-07-01), Genest et al.
patent: 4310720 (1982-01-01), Check, Jr.
patent: 4369332 (1983-01-01), Campbell, Jr.
patent: 4471216 (1984-09-01), Herve
patent: 4691355 (1987-09-01), Wirstrom et al.
patent: 4694492 (1987-09-01), Wirstrom et al.

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