A Method of User Revocation Using Authentication Tree of Group Signature

In a static group signature scheme, users cannot revocate from the group.The focus of this paper is to design a new method to implement dynamic group signature. Firstly, it improves Merkle tree by designing a new dynamic 2-3 authentication tree by changing the node ingredients;then, it applies this improved authentication tree to implement group signature's revocation.Therefore, this 2-3 authentication tree is not only a dynamic authentication tree, but also can be used for dynamic group signature.