Security management function design of computer security defence system

To solve the security defence problems of computer desktop,the base defence function is developed and the security management function is designed.Accoring to the security design requirement of computer security defence system,the security management function based on USBkey is designed.It makes up of user authority management,certification management,authentication protocol,encrypt arithmetic selection and conversation key negotiation.It solves the security management problems of computer security defence system.In running process it insures the whole security of computer security defence system.