高效的基于身份的(受限)部分盲签名

Efficient ID-Based (Restrictive) Partially Blind Signature

提出了一个新的基于身份的部分盲签名方案,其安全性基于q-强Diffie-Hellman困难问题,证明了该方案在随机预言模型下能防止伪造攻击.该方案不需要低效的MapToPoint哈希函数,仅使用了1个配对运算,效率高于其他基于身份的部分盲签名方案.在此方案基础上提出了一个高效的基于身份的受限部分盲签名体制,证明了该方案的正确性、不可伪造性、限制性和部分盲性.

A new identity-based partially blind signature scheme was proposed. Assuming the intractability of the q-strong Diffie-Hellman problem, the scheme was proved to be unforgeable in the random oracle model. Compared with other existing schemes, the new scheme performs more efficient in computation because it doesn＇t need inefficient MapToPoint hash function and only needs one pai- ring computation. Based on the scheme mentioned above, a restrictive partially blind signature is proposed and proved to be efficient, correct, unforgeable, as well as restrictive and partially blind.