网络技术的发展已经渗透到社会生活的各方面。人们利用网络进行各种活动将越来越频繁、越来越广泛。签名是活动中一种常见的认证方式。但是，传统的签名方式存在许多缺点。确认传统签名相当困难。针对传统签名的缺点，人们提出了数字签名的认证技术。数字签名具有许多优点，如? The development of network technology has infiltrated all aspects of social life. People use the Internet to carry out various activities will be more frequent, more extensive. Signature is a common authentication method in activities. However, the traditional signature method has many disadvantages. Confirming the traditional signature is quite difficult. In response to the shortcomings of traditional signatures, people have proposed digital signature authentication technology. Digital signatures have many advantages, such as?