New Efficient Group Blind Signature Scheme with Membership Revocation and Unlinkability

A new efficient group blind signature scheme with membership revocation on the basis of ACJT group scheme was provided.Drawing on the thought of the membership revocation of Chen,in the process of signature,it only uses a random number to decrease two zero-knowledge proofs of the original program to one,and decreases the mode index operation,thus shortens the length of signatures,while the group blind signature thinking proposed by C.Popescu is joined in the signature process,increases blind to the improved group signature with the membership revocation,and the program has also effectively addressed the flaw of linkability of the group blind signature programs proposed by C.Popescu.The new efficient group blind signature scheme with membership revocation and unlinkability can be applied to multi-bank electronic cash system,used to realize the multi-bank electron cash system which can abolish the group members,enables the electronic cash system to conform to the application of the real financial system.