数字签名是实现安全电子交易的关键技术。提出了一个新的、有效的签名方案，并在安全证明不使用分又归约技，术的情况下将它的安全性归约到计算Diffie—Hellman问题的安全性。-Digital signature is to achieve secure electronic transactions key technologies. Proposed a new, efficient signature scheme, and the security certificate does not use sub-again reduction techniques to the case of surgery the safety of its reduction to the calculation of Diffie-Hellman problem of security.