摘要
分析一种基于ElGamal的前向安全签名方案。该方案满足前向安全性,但在签名者私钥泄漏后,签名是不安全的,即不满足后向安全性,有一定的局限性。该文引入强前向安全的思想,克服了该方案的局限性,并将改进后的强前向安全签名与代理签名相结合,提出一种新的满足强前向安全定义的强前向安全代理签名方案。
Forward security signature scheme satisfies forward security. However, the scheme is not secure if signature＇s secret key is revealed. For this reason, this paper proposes a new strong forward security proxy signature scheme combining strong forward security and proxy signature, which introduces strong forward concept and overcomes limitation of the previous scheme.
出处
《计算机工程》
CAS
CSCD
北大核心
2008年第17期162-163,166,共3页
Computer Engineering
关键词
前向安全
后向安全
强前向安全
代理签名
forward security
afterward security
strong forward security
proxy signature
