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随着计算机网络和分布式系统的发展，网络安全成为一个越来越重要的研究课题．数字签名是一种重要的安全机制，它能提供数据源的证明、数据完整性和不可否认服务，因而得到越来越广泛的应用．讨论了数字签名的特征、数字签名的各种算法和实现方法，以及数字签名在数据通信和计算机网络中的应用．
With the development of computer networks and distributed systems, network security has become an increasingly important research topic. Digital signature is an important security mechanism, it can provide data source certification, data integrity and non-repudiation services, which are more and more widely used. Discusses the characteristics of digital signatures, various algorithms and implementation of digital signatures, and the application of digital signatures in data communications and computer networks.