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Title:
SIGNATURE/VERIFICATION SYSTEM, SIGNATURE DEVICE, VERIFICATION DEVICE, SIGNATURE/VERIFICATION METHOD, AND PROGRAM
Document Type and Number:
Japanese Patent JP2016092639
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a group structure maintenance signature method having a verification key, message, signature, and signature key, all of which are a group element, and having safety against a selection message attack.SOLUTION: A signature/verification system includes: a signature device that creates a signature Sfor a message M by using, as a one-time signature method, a group structure maintenance signature method having safety against a selection message attack and creates a signature Sfor a one-time verification key capable of being randomly created by the signature device itself by using a signature method having safety against a random message attack; and a verification device for verifying the signatures S, S.SELECTED DRAWING: Figure 1

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Inventors:
ABE MASAYUKI
Application Number:
JP2014226184A
Publication Date:
May 23, 2016
Filing Date:
November 06, 2014
Export Citation:
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Assignee:
NIPPON TELEGRAPH & TELEPHONE
International Classes:
H04L9/32
Domestic Patent References:
JP2012090183A2012-05-10
JP2015216514A2015-12-03
JP2012090183A2012-05-10
JP2015216514A2015-12-03
Foreign References:
WO2008127428A22008-10-23
WO2008127428A22008-10-23
Other References:
ABE, MASAYUKI ET AL., CONSTANT-SIZE STRUCTURE-PRESERVING SIGNATURES GENERIC CONSTRUCTIONS AND SIMPLE ASSUMPTIONS [ONLINE], JPN6017031292, 27 June 2012 (2012-06-27), pages 1 - 30
BELLARE, MIHIR ET AL., TWO-TIER SIGNATURES, STRONGLY UNFORGEABLE SIGNATURES, AND FIAT-SHAMIR WITHOUT RANDOM ORACLES, JPN6017031295, 10 April 2008 (2008-04-10), pages 1 - 21
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Yoshimura Munehiro



 
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