摘要
Li-Yang提出了基于Elgamal有序多重签名方案,但是由于该方案在签名验证过程中没有对成员公钥进行验证,从而容易受到伪造攻击,因此在安全性上有所欠缺。分析上述方案的安全性,提出了一种新的有序多重签名方案。通过加入公钥验证机制,从而能够有效抵抗伪造攻击,并且该改进方案与其他方案相比,在安全性相当的情况下省去一次指数求幂的过程,从而使运算效率更高。
The Elgamal-based sequence muhi-signature scheme presented by Li ＆ Yang is weak in security because of easily suffering forgery attack due to no examination upon user＇ s public key during the validating process of the signatures authentication. In this paper it proposes a new sequence multi-signature after analyzing the vulnerable weakness of Li-Yang＇ s scheme. With the mechanism of public key checking supplemented, this scheme can resist the forgery attack and allays attack effectively. In comparison with other schemes ,＇it omits one-order exponentiation operation under the condition of similar security so it is more effective in computation.
出处
《计算机应用与软件》
CSCD
2009年第3期258-259,共2页
Computer Applications and Software
关键词
数字签名
多重签名
离散对数
伪造攻击
Digital signature Multi-signature Discrete logarithm Forgery attack
