The Composite Discrete Logarithm and Secure Authentication
复合离散对数与安全认证研究

In this paper,we review Girauh's Authentication algorithm and Poupard's Secure analysis for the algorithm. Security condition that can resist initiative attack is given based on undistinguished evidence Girault's algorithm even if processing one overlap. Finally an new Blind Signature scheme is put forward which is based on security de compose factor. High efficiency is the most peculiarity of the blind signature algorithm.