中文摘要：

前向安全代理签名方案无法保证代理者密钥泄漏后未来时段代理签名的安全性。基于单向散列链,对王天银等提出的前向安全代理签名方案进行了改进,使该方案的代理签名具有强前向安全性：即使代理密钥被泄露,攻击者也无法伪造过去和未来时段的代理签名,并且具有密钥泄露检测功能。

英文摘要：

Forward-secure proxy signature schemes can not protect the security of the signatures generated after the proxy key exposure.Based on the forward-secure proxy signature scheme proposed by Wang Tianyin,et al,a strong forward-secure proxy signature scheme with key exposure detection is proposed by introducing the mechanism of one-way hash chain.Even if the malicious attacker can intrude the system at certain period,he can not forge any signatures in the past and future periods.