A Group Signature Scheme Based on Discrete Logarithm
Chen Xiu-yu · Computers & Security · 2010
A group signature scheme based in discrete logarithm is proposed. When a new member attend to join the group, the Certification Authority(CA) will validate the identify of this member to ensure the unauthorized members unable to join the group. When the member leaves the group, CA will record the withdraw time to avoid outdated members can continue to use the signature. The signature can only be sent to receiver after CA approved. And the signatures will be recorded in database by group administrator which can be reserved for future using. Analysis shows the signature generated by this proposed scheme satisfies sufficient security.