Distributed fingerprints for information integrity verification
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United States of America Patent
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Jun 25, 1996
Grant Date -
N/A
app pub date -
Jun 28, 1994
filing date -
Jun 28, 1994
priority date (Note) -
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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.
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