A Novel ID-Based Group Signature Scheme

As a special signature, group signature allows group members to anonymously sign arbitrary messages on behalf of the group, if case of dispute, the group manager will be able to reveal the identity of the signer. To the best of my knowledge, most of the group signature schemes available based on identity are insecure. In this paper, we propose a novel ID-based group signature scheme. Our proposed scheme has the following advantages: (I) only needs 10 exponential operators in the signing phase, (2) the size of signature and public key is independent of the group number; (3) less strong assumption restriction. (4) resisting collusion. In comparison with state-of-the-art ACJT scheme, the computation cost of signing in our scheme is further less than one of ACJT scheme. Hence, our scheme is an efficient signature scheme. Finally, we also give the security analysis to the scheme.