Cryptosystem employing worst-case difficult-to solve lattice problem
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United States of America Patent
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Apr 7, 1998
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May 21, 1996
filing date -
May 21, 1996
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Abstract
A cryptosystem and cryptographic method are provided for performing tasks such as encoding/decoding, signing messages, and verifying identity. The system and method employ a problem which is difficult to solve in the worst case. Because of the worst-case nature of the problem employed, a system and method according to the invention has advantageous level of security, In a class of preferred embodiments, the difficult problem is one of the recognized difficult problems associated with the mathematical theory of lattices. These problems include finding short vectors and sets of basis vectors from a lattice. Cryptographic protocols are performed, using these problems.
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