Anonymous Authentication System Using Group Signature

As the internet has been widely spread, it becomes big issues that an excessive demand of unnecessary private information at Web servers and invasion of privacy. Anonymous authentication technology is a solution of this problem. It can protect the personal information and guarantees the convenience which an Internet gives in our life. Anonymous authentication is an authentication method based on a digital signature scheme offering anonymity such as blind signature, group signature, ring signature, traceable signature, etc. The digital signature scheme that providing anonymity had been being mainly studied for an application including an e-cash and electronic voting system, etc. But recently the digital signature method is studied in the Internet environment with one of the anonymous authentication method for the protecting personal information. In this paper, we introduce a group signature scheme which is one of the signature schemes supplying anonymity and propose the anonymous authentication system structure using the group signature scheme.