A Provable Secure Threshold Signature Scheme Based on GDH Group
基于GDH群可证安全的门限签名方案

There exist the possibility of comparison attacks on the Boneh et al.'s short signature and the Boldyreva's threshold signature due to their schemes couldn't provide the property of probahilistic signature.This paper firstly gives its analysis.Then a threshold signature scheme with the property of probabilistic signature based on the Gap Dif- fie-Hellman (GDH) group is proposed and its security proof is given in the Random Oracle model.Our construction can prevent the risk of comparison attacks and the security is the same as Boldyreva's threshold signature scheme,that is,it can provide the robustness and unforgeability,and it can tolerate t