Efficient threshold signature scheme in standard model

Abstract

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.