基于哈希函数的无证书聚合签名方案研究  

Study of Certificateless Aggregate Signature Scheme Based on Hash Function

作　　者：王启明[1] 甘泉[1] 时合生[1] 

机构地区：[1]平顶山学院计算机科学与技术学院,河南平顶山467002

出　　处：《计算机与现代化》2015年第4期103-106,共4页Computer and Modernization

摘　　要：通过对HZD方案进行安全分析,该方案不能抵抗TypeⅡ攻击者A2的伪造攻击。针对此类问题,提出一种改进方案。该方案在签名过程中增加一个哈希函数,加强在聚合签名验证中对主密钥和公钥的约束。安全分析表明,在计算CDHP困难和随机谕言模型的假设下,该方案在适应性选择消息攻击下具有不可伪造性。效率分析表明,该方案在签名与验证过程中,签名的长度是固定的,与同类安全的无证书聚合签名方案相比效率较高。Aiming at analysis of program for HZD,points out that this scheme can＇t resist forgery attack under Type Ⅱ attacker A2. The paper proposes an improved scheme. Solution add a Hash function in the process of signature and signature in the polymerization in strengthening of the master key and the public key constraints. Security analysis shows that the scheme is existential unforgeable adaptively chose message attack in the random oracle model under the computational Diffie-Hellman assumption. Efficiency analysis shows because the improved scheme verification and the length of the signature is fixed,the improved scheme is more efficient than the existing security schemes.

关 键 词：哈希函数 无证书聚合签名 CDHP 适应性选择 

分 类 号：TN309[电子电信—物理电子学]