中文摘要：

将双线性对、前向安全数字签名与代理签名相结合，构造了一个基于双线性对的具有前向安全性的代理签名方案。新方案弥补了居上游等人方案的不足，即使某一时刻的代理签名密钥出现泄露，之前的每一时段的代理签名仍然是有效的。经过安全性证明可知，新方案不仅具有前向安全性，而且满足强代理签名体制的所有安全要求；此外，该方案以双线性对为工具，与已有的基于RSA和离散对数的代理签名方案相比，具有计算效率更高的优点。

英文摘要：

By combining the bilinear pairings, forward-secure digital signature and proxy sig- nature, a forward secure proxy signature scheme based on bilinear pairings was proposed. The new scheme made up the insufficiency of Ju Shang yours scheme in that even if at a certain mo- ment proxy signature key is exposed the proxy signature before the momnet is still valid. The se- curity proof shows that the new scheme not only has forward security,but also meet all safety re- quirements of strong proxy signature scheme; in addition, the sheme,with bilinear pairings as a tool,shows higher efficiency than RSA and discrete logarithm signature scheme.