针对网络安全的三种技术方式进行说明,比较各种方式的特色以及可能带来的安全风险或效能损失,并就信息交换加密技术的分类作以分析,针对PKI这一信息安全核心技术,论述了其安全体系的构成。 This paper describes the three technical methods of network security, compares the features of different methods and the possible loss of security risk or efficiency, and analyzes the classification of information exchange encryption technology. According to PKI, an information security core technology, The composition of its security system.