摘要
在密码学中,使用Hash函数必然使签名方案因Hash函数的不安全性而遭受相关攻击,从而导致签名方案的安全性降低。提出一种新的基于ElGamal签名体制的代理盲签名方案。该方案不需要使用Hash函数,避免了使用Hash函数带来的威胁;而且新方案实现了电子交易中的不可伪造性和不可链接性,有效地防止了双方事后抵赖,且计算量较低。
In cryptography, the scheme of signature using Hash functions will no doubt face interrelated attacks due to the insecurity of the function, and therefore it will result in lower security. A new proxy blind signature scheme based on the ElGamal signature system is proposed. The threat brought by the Hash function is avoided, and the unforgeability and unlinkability in electronic tractions of business is achieved. The repudiation is prevented effectively, and the computation quantity is relatively small as well.
出处
《计算机应用与软件》
CSCD
2009年第3期134-135,157,共3页
Computer Applications and Software
基金
重庆市教委科学技术研究项目(KJ060510)
