File security system

Details File security system File security system

1992-07-20

1993-11-30

Gangialosi, Salvatore

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, H04K 100

Patent

active

052673138

ABSTRACT:
A file security system of such a constitution that after plaintext has been enciphered by data encryption key means the encryption key means per se is stored or made freely transmissible in the state further enciphered by the encrytion key maintained in secret and the information thus processed can be deciphered into plaintext information only by making good use of said encryption key means.

REFERENCES:
patent: 4731840 (1988-03-01), Mniszewski et al.
patent: 4853962 (1989-08-01), Brockman
patent: 5058162 (1991-10-01), Santon et al.
patent: 5081678 (1992-01-01), Kaufman et al.

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