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| Forgery Attack to a Group Signature Scheme |
| Li Yan-jun①; Wu Yu-hua①; Li Meng-dong①; Yang Gang② |
| ①Department of Electronic Information Engineering, Beijing Electronic Science and Technology Institute,Beijing 100070, China; ②School of Science, Beijing Institute of Technology, Beijing 100081, China |
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Abstract Wang XM proposed a group signature scheme and claimed that it can resist all kinds of forgery attacks(2003). However，it was carefully analyzed, and there were defects in it: First, It cannot revoke group member effectively. Second，It cannot resist forgery attack.. In this paper, an effective attack scheme is proposed, and two factors that a secure group signature scheme should possess was given.
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Received: 14 December 2005
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2007, Vol. 29 
