随着信息技术的飞速发展,网络已经应用于我们生活的每一个角落。在网络给我们诸多方便的同时,网络中存在的安全隐患也越来越值得重视。计算机信息系统安全性的定义到目前并没有得到统一,比较权威的 ISO对其定义为“为数据处理系统建立和采用的技术和管理的安全保护。保护计算机硬件,软件和数据不因偶然和恶意的原因遭到破坏,更改和泄露”。计算机的网络安全包括物理安全和逻辑安全,其中物理安全指系统设 With the rapid development of information technology, the Internet has been applied in every corner of our lives. In the network to give us many conveniences at the same time, the network security risks are also more and more worthy of attention. The definition of computer information system security has not been unified so far, and the more authoritative ISO defines it as “the security protection of the technology and management established and adopted for the data processing system.” The protection of computer hardware, software and data from accidental and malicious The reasons for the destruction, change and disclosure. " Computer network security includes physical security and logical security, in which physical security refers to the system