有效的基于身份的代理环签名方案*

以往的代理环签名有一个共同的缺陷，即签名生成和验证时需要太多的对运算，而大大影响了效率，给出了一个有效的基于身份的代理环签名。该方案在签名生成时不需要对运算，在签名验证时无论用户有多少，仅需两个对运算，因此比以往的方案更有效。由于其具有代理签名和环签名两者的优点，在代理签名者想代表原始签名者签名，同时需要提供匿名性时是非常有用的。

Efficient ID based proxy ring signature scheme

The existed proxy ring signature schemes have a common flaw. There is too much pairings computation at signature. This paper proposed an efficient ID based proxy ring signature scheme. As compared with the existed proxy ring signature schemes, this scheme was more efficient because it has no computational cost of bilinear pairings at signature generation and only two pairings computation at signature verification. It has advantages of proxy signature and ring signature. It is very useful when proxy signers needed to sign messages on behalf of the original entity while providing anonymity.