摘要： 对最近提出的一种新型代理数字签名方案——匿名代理数字签名方案进行了密码分析，发现该方案存在安全漏洞：原始签名者可以伪造其指定的代理签名者的有效代理数字签名，还可以诬陷其他任何人为其指定的代理签名者。对该方案进行了改进，安全性分析表明，改进后的方案可以抵抗原始签名者的伪造攻击，并且保留了原方案的一些优点。
关键词:
匿名代理签名,
可识别性,
可跟踪性,
伪造攻击
Abstract: Through the cryptanalysis of a new proxy digital signature scheme—anonymous proxy signature digital scheme proposed recently, it is found that this scheme has security leaks and the original signer can not only forge the proxy signer’s valid proxy signature, but also frame anyone else as his designated proxy signer. An improvement is given, and the security analysis shows that it can resist the forgery attacks and retains some merits of the original scheme.
Key words:
Anonymous proxy signature,
Indentifiability,
Traceability,
Forgery attack
中图分类号:
王天银;蔡晓秋;张建中. 一种新型代理签名方案的密码分析及改进[J]. 计算机工程, 2007, 33(12): 178-179.
WANG Tianyin; CAI Xiaoqiu; ZHANG Jianzhong. Cryptanalysis and Improvement of New Proxy Signature Scheme[J]. Computer Engineering, 2007, 33(12): 178-179.