Cryptanalysis of Chen-Zhu's Group Signature Scheme
Qi You Xie · Jisuanji gongcheng · 2004
In 2000,Chen- Zhu proposed a group signature scheme that is more efficient than the previously known schemes. This paper shows that Chen- Zhu's scheme is universally forgeable, that is, the group authority can forge a valid group signature on an arbitrary message, which stands in any group member.