Paper Abstract and Keywords |
Presentation |
2016-03-11 10:00
Reconsideration of Fail-Stop Signature Schemes and Their UC-Security Masahiro Nomura (Ex-Chiba Univ.), Katsuhiro Nakamura (Chiba Univ.) IT2015-131 ISEC2015-90 WBS2015-114 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Fail-Stop Signature (FSS) schemes [1],[2] are signature schemes which satisfy unforgeability even against a forger with super-polynomial computational power and non-repudiability against a dishonest signer with polynomially-bounded computational power. To use FSS schemes ''safely'' in a large system, it must be shown that they satisfy the UC {small(Universally Composable)}-security [3]. However, there exists a problem that it is difficult to decide the computational power of an adversary in the UC-security since the computational power of a forger is different from that of a dishonest signer. To solve the problem, the authors [4] have proposed a framework with TTP {small (Trusted Third Party)}, but it is not so logical framework since there isn't any dishonest signer there by TTP. In this paper, the authors construct a new framework where there exist a forger and a dishonest signer with polynomially-bounded computational power, but the forger can get (limited) super-polynomial computational power by a helper functionality. Then the authors construct an FSS scheme which satisfies the UC-security under some conditions. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Digital Signature / Fail-Stop Signature / Unforgeability / Non-Repudiability / UC-Security / / / |
Reference Info. |
IEICE Tech. Rep., vol. 115, no. 501, ISEC2015-90, pp. 181-188, March 2016. |
Paper # |
ISEC2015-90 |
Date of Issue |
2016-03-03 (IT, ISEC, WBS) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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IT2015-131 ISEC2015-90 WBS2015-114 |
Conference Information |
Committee |
IT ISEC WBS |
Conference Date |
2016-03-10 - 2016-03-11 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
The University of Electro-Communications |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
joint meeting of IT, ISEC, and WBS |
Paper Information |
Registration To |
ISEC |
Conference Code |
2016-03-IT-ISEC-WBS |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Reconsideration of Fail-Stop Signature Schemes and Their UC-Security |
Sub Title (in English) |
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Keyword(1) |
Digital Signature |
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Fail-Stop Signature |
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Unforgeability |
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Non-Repudiability |
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UC-Security |
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1st Author's Name |
Masahiro Nomura |
1st Author's Affiliation |
Ex-Chiba University (Ex-Chiba Univ.) |
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Katsuhiro Nakamura |
2nd Author's Affiliation |
Chiba University (Chiba Univ.) |
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Speaker |
Author-1 |
Date Time |
2016-03-11 10:00:00 |
Presentation Time |
25 minutes |
Registration for |
ISEC |
Paper # |
IT2015-131, ISEC2015-90, WBS2015-114 |
Volume (vol) |
vol.115 |
Number (no) |
no.500(IT), no.501(ISEC), no.502(WBS) |
Page |
pp.181-188 |
#Pages |
8 |
Date of Issue |
2016-03-03 (IT, ISEC, WBS) |
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