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Paper Abstract and Keywords
Presentation 2006-04-11 16:30
Cryptanalysis of A Threshold Signature Scheme for Group Communications without a Shared Distribution Center
Pang Liaojun (Xidian Univ.), Li Huixian (Dalian Univ. of Tech.), Wang Yumin (Xidian Univ.) SANE2006-43
Abstract (in Japanese) (See Japanese page) 
(in English) Recently, Chang, Yang and Hwang proposed a threshold signature scheme for group communications without a shared distribution center, which includes a (t, n) threshold signature process and a (k, l) threshold verification process. In their scheme, any t participants can represent a group (signing group) to sign a message, and any k participants can represent another group (verifying group) to verify the signature. However, their scheme is insecure. In this paper, we shall make some cryptanalysis on their scheme and show that it violates the requirement upon the (t, n) threshold signature with (k, l) threshold-shared verification.
Keyword (in Japanese) (See Japanese page) 
(in English) cryptanalysis / digital signature / threshold cryptosystem / information security / / / /  
Reference Info. IEICE Tech. Rep., vol. 106, no. 1, SANE2006-43, pp. 235-238, April 2006.
Paper # SANE2006-43 
Date of Issue 2006-04-03 (SANE) 
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)
Download PDF SANE2006-43

Conference Information
Committee SANE  
Conference Date 2006-04-10 - 2006-04-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Xidian Univ., Xi'an, China 
Topics (in Japanese) (See Japanese page) 
Topics (in English) WSANE2006 
Paper Information
Registration To SANE 
Conference Code 2006-04-SANE 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Cryptanalysis of A Threshold Signature Scheme for Group Communications without a Shared Distribution Center 
Sub Title (in English)  
Keyword(1) cryptanalysis  
Keyword(2) digital signature  
Keyword(3) threshold cryptosystem  
Keyword(4) information security  
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1st Author's Name Pang Liaojun  
1st Author's Affiliation Xidian University (Xidian Univ.)
2nd Author's Name Li Huixian  
2nd Author's Affiliation Dalian University of Technology (Dalian Univ. of Tech.)
3rd Author's Name Wang Yumin  
3rd Author's Affiliation Xidian University (Xidian Univ.)
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Speaker Author-1 
Date Time 2006-04-11 16:30:00 
Presentation Time 20 minutes 
Registration for SANE 
Paper # SANE2006-43 
Volume (vol) vol.106 
Number (no) no.1 
Page pp.235-238 
#Pages 4 
Date of Issue 2006-04-03 (SANE) 

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