Encryption apparatus and method capable of controlling encryptio

Details Encryption apparatus and method capable of controlling encryptio Encryption apparatus and method capable of controlling encryptio

1996-04-09

1998-04-14

Cain, David C.

Cryptography

Particular algorithmic function encoding

380 49, 380 42, 380 44, 380 50, H04K 100

Patent

active

057402493

ABSTRACT:
An encryption apparatus is constituted by a plurality of rungs of round functions. Each round function comprises internal state storing means for storing an internal state, internal state updating means for updating the internal state stored in the storing means, and an F-function for executing an encryption upon receipt of data to be encrypted, an encryption key, and the internal state stored in the internal state storing means. The internal state stored in the internal state storing means is updated by the internal state updating means every time the encryption is executed by the F-function.

REFERENCES:
patent: 4157454 (1979-06-01), Becker
patent: 5058164 (1991-10-01), Elmer et al.
patent: 5241597 (1993-08-01), Bright
IBM Technical Disclosure Bulletin, vol. 20, No. 10, pp. 3982-3983, Mar. 1978, P.N. Prentice, "Method of Implementing Key Chaining".

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