An application of modified optimal-type elliptic curve blind signature scheme to threshold signature

Abstract

Expression of blind message in the optimal-type blind signature scheme was modified so that it can combine with threshold signature, which leads to an effective threshold blind signature scheme based on elliptic curve cryptography, it has the following securities: strong verifiability, nonrepudiation, unforgeability, blindness and robustness, and also takes advantage of characteristics of elliptic curve such as higher security and shorter key, as well as lower computational complexity compared with the previous schemes.