变被动防御为主动防御 为保证在网络环境下信息系统的安全,人们进行了大量的研究工作,但主要的方向集中在防御体系的建设,如防火墙、信息加密、口令系统、入侵检测和漏洞扫描、防病毒及灾难恢复等等。在攻与防的一对矛盾中,攻方总是处于主动地位,防御总是处于被动地位。防御系统、保护 Changing from passive defense to active defense In order to ensure the security of information systems in the network environment, a great deal of research work has been done, but the main directions are focused on the construction of defense systems such as firewall, information encryption, password system, intrusion detection and vulnerability scanning , Anti-virus and disaster recovery and more. In a contradiction between attack and defense, the offensive side is always in the active position and the defense is always in a passive position. Defense system, protection