Novel conic-based group signature scheme with revocation

Several group signature schemes have been proposed up to date. However, in order for the entire group signature concepts to become practical and credible, the problems of secure and efficient procedures of such schemes must be addressed. At the same time, allowing group members to join or to leave from the group dynamically is another urgent requirements for group signature concepts to become really practical. In this paper, we construct the first group signature scheme with group member revocation function from conic. Due to the properties of conic, the proposed scheme is of great efficiency.