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Journal of Zhejiang University SCIENCE A 2004 Vol.5 No.1 P.50-54

http://doi.org/10.1631/jzus.2004.0050


Verifiable threshold signature schemes against conspiracy attack


Author(s):  GAN Yuan-ju

Affiliation(s):  College of Information Science and Engineering, Central South University, Changsha 410075, China

Corresponding email(s):   yjgan@eyou.com

Key Words:  Cryptography, Threshold group signature, Conspiracy attack, Forgery attack


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GAN Yuan-ju. Verifiable threshold signature schemes against conspiracy attack[J]. Journal of Zhejiang University Science A, 2004, 5(1): 50-54.

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doi="10.1631/jzus.2004.0050"
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A1 - GAN Yuan-ju
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PB - Zhejiang University Press & Springer
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Abstract: 
In this study, the author has designed new verifiable (t,n) threshold untraceable signature schemes. The proposed schemes have the following properties: (1) Verification: The shadows of the secret distributed by the trusted center can be verified by all of the participants; (2) Security: Even if the number of the dishonest member is over the value of the threshold, they cannot get the system secret parameters, such as the group secret key, and forge other member's individual signature; (3) Efficient verification: The verifier can verify the group signature easily and the verification time of the group signature is equivalent to that of an individual signature; (4) Untraceability: The signers of the group signature cannot be traced.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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[4] Harn, L.,1994. Group-oriented (t,n) threshold digital signature scheme and multisignature. IEEE Proceedings, Computers and Digital Techniques, 141(5):307-313.

[5] Lee,N.Y., Hwang ,T. and Li,C.M.,2000. (t,n)threshold untraceable signatures. Journal of Information science and engingeering,16(6):835-846.

[6] Li,C.M., Hwang,T. and Lee,N.Y.,1995.(t,n) threshold signature schemes based on discrete logarithm. In: Cryptogy procedings of Eurocrypt'94,Springer-verlag, Berlin, p.191-200.

[7] Li, Z.C., Hui, L.C.K., Chow, K.P., Chong, C.F., Tsang, W.W. and Chan, H.W.,2001. Security of Wang et al.'s group-oriented (t,n) threshold signature schemes with traceable signers. Information Processing Letters, 80(6):295-298.

[8] Michels, M. and Horster, P.,1997. On the risk of disruption in several multiparty signature schemes. In: Cryptology-Crypto'96 Proceedings, Springer-verlag, Berlin, p.334-345.

[9] Tompa,M. and Woll,H.,1988.How to share a secret with cheaters. Journal of cryptology, 1(2):133-138.

[10] Tseng, Y.M. and Jan, J.K.,1999. Attacks on threshold signature scheme with traceable signers. Information Processing Letters, 71(1):1-4.

[11] Wang, C.T., Lin, C.H. and Chang, C.C.,1998. Threshold signature schemes with traceable signers in group communications. Computer Communications, 21(8):771-776.

[12] Wang ,G.L. and Qing, S.H.,2000. The weaknesses of some threshold group signature schemes. Journal of Software, 11(10):1326-1332(in Chinese).

[13] Wang, G.L.,Wang M.S., Ji ,Q.G. and Qing, S.H.,2001. Security limits of the LHL threshold group signature scheme. Journal of Computers, 24(9):897-902 (in Chinese).

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