发明名称 |
SIGNATURE AND VERIFICATION METHOD, SIGNATURE GENERATION DEVICE, AND SIGNATURE VERIFICATION DEVICE |
摘要 |
The present invention provides a signature generation device and a signature verification device capable of countering a transcript attack that seeks a private key by analyzing a plurality of signed documents (pairs of a message and a signature) signed using the NTRUSign signature scheme. The signature generation device calculates a hash value vector H of message data, adds a vector based on a private distribution to the hash value vector H to calculate a converted hash value vector H', and seeks, as a signature vector S, the closest lattice point to the converted hash value vector H' in a lattice defined by private key basis vectors. The signature verification device determines whether the distance between the hash value vector H of the message data and the signature vector S is equal to or less than L' and, if so, recognizes the message data as valid.
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申请公布号 |
EP2264941(A1) |
申请公布日期 |
2010.12.22 |
申请号 |
EP20090730374 |
申请日期 |
2009.03.02 |
申请人 |
PANASONIC CORPORATION |
发明人 |
FUTA, YUICHI;SHIZUYA, HIROKI;ISOBE, SHUJI;HASEGAWA, SHINGO |
分类号 |
H04L9/32;G09C1/00 |
主分类号 |
H04L9/32 |
代理机构 |
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