Verification System and Method with Extra Security for Lower-Entropy Input Records
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United States of America Patent
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Issued Date -
Aug 28, 2014
app pub date -
May 24, 2013
filing date -
Feb 22, 2013
priority date (Note) -
Abandoned
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Abstract
An authentication system for digital records has a hash tree structure that computes an uppermost, root hash value that may be digitally signed. A random or pseudo-random number is hashed together with hash values of the digital records and acts as a blinding mask, making the authentication system secure even for relative low-entropy digital records. A candidate digital record is considered verified if, upon recomputation through the hash tree structure given sibling hash values in the recomputation path and the pseudo-random number, the same root hash value is computed.
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