代理签名

By far, most threshold proxy signature schemes proposed are based on the discrete logarithm problem.

目前所提出的门限代理签名方案多基于有限域上的离散对数问题。

Models of some of these questions are formalized and provably secure algorithms are presented.

最后，对与分布式密码相关的密钥演化体制和代理签名进行了研究。

This paper proposed a secure proxy signature scheme based on the security of logarithmic problem and one-way function.

基于离散对数问题和单向函数的安全性，提出了一个新的安全的代理签名方案。

In 1996, Mambo et al. first introduced the concept of proxy signatures.

Mambo等人于1996年首次提出了代理签名的概念。

In 1996, Mambo et al. introduced the concept of proxy signature.

1996年，Mambo等人提出了代理签名概念。

In this paper, the first identity-based proxy signature scheme without random oracles is proposed based on Paterson, et al's identity-based signature scheme. The unforgeability of the proposed scheme is based on the hardness of the well known computational Diffie-Hellman problem.

利用Paterson等的基于身份的签名方案构造了一个基于身份的代理签名方案，并在标准模型下基于计算Diffie-Hellman假设证明了它的安全性。

The security of the Fu-Kou-Xiao's proxy signature scheme with proxy signer's privacy anonymity was analyzed, and it was shown that the scheme did not possess the property of strong unforgeability.

对 Fu-Kou-Xiao 具有代理匿名性的代理签名方案进行分析，指出该方案不具备强不可伪造性。

Third,in order to solve the problem of the contradiction between the authentication and the privacy,we construct a designated-verifier chameleon proxy signature scheme.Only the designated verifier can verify the validity of the signature which can efficiently prevent the forgery from the dishonest verifiers.

第三，为了解决认证性和隐私性相冲突的问题，我们基于身份密码系统并结合我们所构造的一个卡麦龙函数，提出了一种新的指定验证者卡麦龙代理签名方案，在该方案中，只有指定的接受者能够验证签名的有效性，该方案能够有效的保护验证者的利益。

They are still secure against the original signers forgery attack.

我们的方法可以应用到存在原始签名人伪造的其他ElGamal类代理签名方案。

This paper analyzes the existing ID-based blind signatures and proxy signatures. It is found that these systems need to trust a PKG unconditionally.

本文分析了现有的基于身份的盲签名和代理签名，发现这些系统都需要无条件信任私钥产生中心（PKG， Private Key Generator）。

If you are unfortunate enough to the lovelorn, please tell me, I will help you out, really, please contact me!

如果你不幸失恋了，请告诉我，我会帮助你摆脱困境，真的，请联系我啦！

China's plan to cut energy intensity by 20 percent and pollutant discharges by 10 percent between 2006 and 2010 is a case in point.

中国计划在2006年到2010间降低20%的能源强度和减少10%的主要污染物排放，就是一个这样的例子。