An Efficient Group Signature Scheme for Large Groups
一种适合大群组的高效群签名方案

A secure and efficient group signature scheme without using of signature of knowledge is proposed. The scheme has constant size of group public key and group signature, and the group public key need not to be updated when receiving the registration of a group member. The operation cost of sign and verify algorithm is less than ACJT scheme, which stands for the state of the art. The proposed scheme can effectively resist coalition attacks, and the effi- ciency is also independent with the group size, which results that the scheme is fit for large groups.