随着信息化技术的飞速发展,许多有远见的企业都认识到依托先进的IT技术构建企业自身的业务和运营平台将极大地提升企业的核心竞争力,使企业在残酷的竞争环境中脱颖而出。经营管理对计算机应用系统的依赖性增强,计算机应用系统对网络的依赖性增强。计算机网络规模不断扩大,网络结构日益复杂。计算机网络和计算机应用系统的正常运行对网络安全提出了更高的要求。信息安全防范应做整体的考虑,全面覆盖信息系统的各层次,针对网络、系统、应用、数据做全面的防范。信息安全防范体系模型显示安全防范是一个动态的过程,事前、事中和事后的技术手段应当完备,安全管理应贯穿安全防范活动的始终。 With the rapid development of information technology, many far-sighted enterprises have realized that relying on advanced IT technologies to build their own business and operation platforms will greatly enhance their core competitiveness so that they can stand out in a harsh competitive environment. The dependence of management on computer application system is enhanced, and the dependence of computer application system on the network is enhanced. The scale of computer networks is constantly expanding, and the network structure is increasingly complicated. The normal operation of computer network and computer application system puts forward higher requirements on network security. Information security should be considered as a whole, comprehensive coverage of all levels of information systems, network, systems, applications, data to make a comprehensive defense. The model of information security precaution system shows that security precaution is a dynamic process. The technical measures should be complete beforehand, during the incident and afterwards. Security management should run through the precautionary activities.