ID-based(t,n) threshold blind signature scheme

A new ID-based threshold blind signature scheme based on bilinear pairings is proposed using the technique of verifiable secret sharing scheme, the dishonest private key generator can not impersonate any user at any time. The threshold signature and blind signature are implemented effectively to make blind signature more secure and effetive in electric business and cash charge busi- ness. Up to now, it is the first pairing-based cryptography on ID-based threshold blind signature. Analysis shows that the proposed scheme has provable security properties of blindness, unforgeability and robustness. Furthermore, it is more efficient compared with the previous schemes.