CRYPTOSYSTEMS BASED ON NON-COMMUTATITY 비가환성에 기초한 암호화 시스템

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The present invention relates to key agreement protocol, public key cryptosystem and digital signature scheme that are cryptographically secure and efficient. More specifically, the present invention provides a method of constructing a key agreement protocol and a public key cryptosystem based on the difficulty of recovering factors from a hidden product in a non-commutative semi-group and based on a trapdoor using a pair of commutative subsets of the semi-group. The present invention also provides a method of constructing a digital signature scheme using an algebraic structure that has an infeasible search problem but has a cryptographically feasible decision problem. The key agreement protocol, the public key cryptosystem and the digital signature scheme can be implemented on various concrete algebraic platforms described in this invention.
Assignee
KAIST
Country
US (United States)
Issue Date
2003-02-13
Application Date
2001-07-27
Application Number
PCT/KR2001/001283
Registration Date
2003-02-13
Registration Number
WO/2003/013052
URI
http://hdl.handle.net/10203/233826
Appears in Collection
MA-Patent(특허)
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