METHOD FOR SECURE SUBSTRING SEARCH
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United States of America Patent
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Issued Date -
Aug 21, 2014
app pub date -
Nov 15, 2013
filing date -
Nov 16, 2012
priority date (Note) -
Abandoned
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Abstract
A system and method for secure substring search, using fully homomorphic encryption, or somewhat homomorphic encryption. In one embodiment, a first string is homomorphically compared to trial substrings of a second string, each comparison producing a ciphertext containing an encrypted indication of whether the first string matches the trial substrings. These ciphertexts are then combined in a homomorphic logical OR operation to produce a ciphertext which contains an encrypted indication of whether the first string matches any of the trial substrings, i.e., whether the first string is contained in the second string.
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