An Efficient Blind Ring Signature Scheme

Anonymous technology is an important identity protection technology, it can realize the privacy-preserving of the user. As two important cryptographic technologies, blind signature and ring signature can realize anonymity, thus, they play very important roles in realizing the anonymity of user´s information. To fit with the requirement in real life, we propose a blind ring signature scheme by combining ID-based cryptology and anonymous signature. And we give formal security proof of anonymity, blindness and unforgeability of our scheme in the random oracle model. In terms of computational cost and the signature size, we show that our scheme is more efficient, two pairing operators are involved in the signing and verifying phase, respectively.