公钥密码体制在现代密码学中占有极其重要的地位,目前己建立或正在建立的各种安全信息传输和交换系统的框架都是按照公钥密码学理论来构筑的。椭圆曲线密码是目前最具潜力的一类公钥密码系统,其安全性问题自然得到了人们的广泛关注和研究。该文介绍了一种数字签名协议,并对其安全性进行了分析。该协议具有一定的代表性,而对协议的分析具有一定的通用性,分析方法也可用于其他数字签名协议的分析中,在此基础上,该文给出了设计数字签名协议的基本原则。 Public key cryptography occupies an extremely important position in modern cryptography. At present, the frameworks of various secure information transfer and exchange systems that have been or are being established are all constructed according to the theory of public key cryptography. Elliptic curve cryptography is one of the most potential public-key cryptosystems nowadays, and its security has naturally attracted people’s attention and research. This paper introduces a digital signature protocol and analyzes its security. The protocol has certain representativeness, but the analysis of the protocol has a certain versatility. The analysis method can also be used in the analysis of other digital signature protocols. On this basis, the paper gives the basic principles of designing the digital signature protocol.