Software-efficient message authentication

Details Software-efficient message authentication Software-efficient message authentication

1994-12-08

1997-07-22

Cain, David C.

Cryptography

Particular algorithmic function encoding

380 23, 380 4, 380 49, H04L 900

Patent

active

056510691

ABSTRACT:
Fast message authentication code generation is achieved by preprocessing a secret key into an efficiently-computable representation of a hash function selected from a family of hash functions that share a characteristic property. The secret key is also mapped into a particular cryptographic transform. The hash function and the transform are used to generate the authentication code. In particular, the hash function is applied to the message to generate a hashed message. The cryptographic transform is then applied to the hashed message to generate a tag. The tag and possibly other information (such as the state of a counter) are then combined to create the authentication code.

REFERENCES:
patent: 4935962 (1990-06-01), Austin
patent: 5199073 (1993-03-01), Scott
patent: 5493614 (1996-02-01), Chaum

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