Distributed fingerprints for information integrity verification

Details Distributed fingerprints for information integrity verification Distributed fingerprints for information integrity verification

1994-06-28

1996-06-25

Cain, David C.

Cryptography

Particular algorithmic function encoding

Nbs/des algorithm

380 25, 380 4, 380 49, H04K 100, H04L 900

Patent

active

055307574

ABSTRACT:
A method and apparatus for determining when a original document has been altered. With this invention the original information in the document is hashed using a one-way hash function. The hashed information is then encoded into a number of fingerprint pieces which are then transmitted to a number of locations. To verify the originality of the document a minimum number of fingerprint pieces are decoded and the purported genuine document is hashed using the one-way hash function. If the results of the latter hash equal the results of decoding the minimum number of fingerprint pieces, then the purported document is accepted as the genuine document.

REFERENCES:
patent: 4908861 (1990-03-01), Brachtl et al.
patent: 5050212 (1991-09-01), Dyson

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