A Group Signature Scheme Based on Chinese Remainder Theorem and Its Improvement
Cheng Xiao-feng · Information Security and Communications Privacy · 2008
Chen Ze wen and others have put forword a group signature scheme based on Chinese Remainder Theorem.This scheme can add or delete an member of the group without changing other effective members,keys and the length of the public key.The security of this scheme can resist collusion attack and forged signature and so on.However,the study indicates that this scheme due to its negligence of common modulus,cannot resist the forged signature attack,and it also can actualize the probability algorithm of factorizing the big integer under the conllusion condition.This paper makes has described some improvement in this aspect.