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Paper Abstract and Keywords
Presentation 2007-09-07 11:40
Sender Authenticated Key Agreements Without Random Oracles
Chifumi Sato (C4 Technology), Takeshi Okamoto, Eiji Okamoto (Univ. of Tsukuba) ISEC2007-80
Abstract (in Japanese) (See Japanese page) 
(in English) The purpose of this paper is to study sender authenticated key agreements by a third party, which uses the received parameters to verify the fact that a sender of a message knows his long-term private key. In particular, we shall propose a standard model for the protocol amongst three entities for the first time. The security of this protocol depends on the difficulty to solve two new problems related to one-way isomorphisms and the co-bilinear Diffie-Hellman problem on multiplicative cyclic groups. It is the first time that the security of a key agreement has been formally proved by using negligible probability, and we believe that our approach contributes to other areas in cryptography.
Keyword (in Japanese) (See Japanese page) 
(in English) Authenticated key agreements / One-way functions / Co-bilinear Diffie-Hellman problems / Standard models / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 209, ISEC2007-80, pp. 49-55, Sept. 2007.
Paper # ISEC2007-80 
Date of Issue 2007-08-31 (ISEC) 
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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Conference Information
Committee ISEC  
Conference Date 2007-09-07 - 2007-09-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ISEC 
Conference Code 2007-09-ISEC 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Sender Authenticated Key Agreements Without Random Oracles 
Sub Title (in English)  
Keyword(1) Authenticated key agreements  
Keyword(2) One-way functions  
Keyword(3) Co-bilinear Diffie-Hellman problems  
Keyword(4) Standard models  
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Keyword(6)  
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Keyword(8)  
1st Author's Name Chifumi Sato  
1st Author's Affiliation C4 Technology, Inc. (C4 Technology)
2nd Author's Name Takeshi Okamoto  
2nd Author's Affiliation University of Tsukuba (Univ. of Tsukuba)
3rd Author's Name Eiji Okamoto  
3rd Author's Affiliation University of Tsukuba (Univ. of Tsukuba)
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Speaker Author-1 
Date Time 2007-09-07 11:40:00 
Presentation Time 25 minutes 
Registration for ISEC 
Paper # ISEC2007-80 
Volume (vol) vol.107 
Number (no) no.209 
Page pp.49-55 
#Pages 7 
Date of Issue 2007-08-31 (ISEC) 

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