Project (No. 60472032) supported by the National Natural Science Foundation of China
Xie and Yu (2005) proposed a group signature scheme and claimed that it is the most efficient group signature scheme so far and secure. In this paper, we show that two dishonest group members can collude to launch two...
Project (No. 10271037) supported by the National Natural Sci-ence Foundation of China
A new group signature with one time secret key is proposed. The main merits are that it only needs the trusted center issuing the partial secret key one time for each group member; and that the group member can genera...