标准模型下高效的门限签名方案

Efficient threshold signature scheme in standard model

为了提高门限签名方案的计算效率,结合Gennaro等(GENNARO R,JAREAKI S,KRAWCZYK H,et al.Secure distributed key generation for discrete-log based cryptosystem.Journal of Cryptology,2007,20(1):51-83)的分布式密钥生成协议和谷科等(谷科,贾维嘉,姜春林.高效安全的基于身份的签名方案.软件学报,2011,22(6):1350-1360)的签名方案,在标准模型下利用双线性对技术构造了一个新的门限签名方案。所提方案没有可信的密钥份额分发中心,每个参与者都可以验证一些必要信息,从而避免了恶意私钥生成中心攻击和公钥份额代换攻击。通过与现有类似的两个门限签名方案对比表明,所提方案减少了双线性对运算,提高了计算效率。

To improve the computational efficiency in the threshold signature scheme, the authors proposed a new threshold signature scheme based on bilinear pairing via combining Gennaro＇s （ GENNARO R, JAREAKI S, KRAWCZYK H, et al. Secure distributed key generation for discrete-log based cryptosystem. Journal of Cryptology, 2007, 20（ 1）： 51 -83） distributed secret key generation solution and Gu＇s （GU K, JIA W J, JIANG C L. Efficient and secure identity-based signature scheme. Journal of Software, 2011, 22（6） ： 1350 - 1360） signature scheme in the standard model. There was no trusted dealer for secret key share distribution and each party could verify the validity of some important information, which guaranteed the proposed scheme can avoid the malicious private key generator attack and public key share replacing attack. The comparison results with two previous threshold signature schemes show that the proposed scheme needs less pairing computation and raises the computational efficiency.