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由于计算机网络系统的开放性,以及现有网络协议和软件系统固有的安全缺陷,使任何一种网络系统都不可避免地、或多或少地存在一定的安全隐患和风险。特别是Internet在使用和管理上的无政府状态,使人们在享受网络所带来的方便快捷和效益的同时,也面临着网络和信息安全方面的巨大威胁。针对这些网络威胁,有必要对网络的各种安全隐患进行归纳分析,并针对各种不安全因素提出相应的防范措施。
Due to the open nature of computer network systems and the inherent security flaws of existing network protocols and software systems, any network system inevitably has more or less certain security risks and risks. In particular, the anarchy in the use and management of the Internet has enabled people to face the tremendous threat of network and information security while enjoying the convenience and efficiency brought by the network. In view of these network threats, it is necessary to summarize and analyze all kinds of network security risks and propose corresponding precautions against various unsafe factors.