Abstract:
A secure problem in a forward-secure proxy signature scheme is pointed out, the proxy signer’s key does not satisfy the forward-security, so that the original scheme is insecure once the adversary gets the proxy signer’s key. The improved scheme proposes an evolution on proxy signer’s key, under the strong RSA assumption, the new scheme is truly forward secure.
Key words:
proxy signature,
forward-security,
strong RSA assumption
摘要: 指出了一个前向安全签名方案的安全漏洞,认为原方案由于代理签名者的私钥不具有前向安全性,使得整个方案在代理签名者的私钥泄漏后不具有安全性。该文的改进方案对代理签名者的私钥进行了进化,在强RSA假定下,新方案具有真正的前向安全性。
关键词:
代理签名,
前向安全性,
强RSA假定
CLC Number:
ZHANG Xiao-min; ZHANG Jian-zhong. Improved Forward-secure Proxy Signature Scheme[J]. Computer Engineering, 2007, 33(21): 140-141.
张晓敏;张建中. 一个改进的前向安全的代理签名方案[J]. 计算机工程, 2007, 33(21): 140-141.