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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2004, Vol. 5 Issue ( 9): 20-    DOI: 10.1631/jzus.2004.1155
    
Improvement of Laih and Yen?ˉs multisignature scheme
XIE Qi, YU Xiu-yuan
Department of Mathematics, Zhejiang University, Hangzhou 310027, China; School of Information and Engineering, Hangzhou Teachers College, Hangzhou 310012, China; Hangzhou Teachers College, Hangzhou 310012, China
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Abstract  A new attack is proposed to show that a specified group of verifiers can cooperate to forge the signature for any message by secret key substitution due to the leaked secret key or by the group public key adjustment because of the renewed members. This paper presents the improvement scheme which overcomes the security weakness of Laih and Yen?ˉs scheme.

Key words： Mathematics      Digital signature      Multisignature      Cryptography     
Received: 13 June 2003     
CLC:  TP309  
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XIE Qi
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XIE Qi, YU Xiu-yuan. Improvement of Laih and Yen?ˉs multisignature scheme. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2004, 5( 9): 20-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2004.1155     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2004/V5/I 9/20

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