At the same time,terminal security control,which is deployed in the backup server,integrates USB-Key digital certificate and server certificate into one,through the core of tampering with monitoring procedure and security management service procedure working together,and manages updates and backup of web server and backup server efficiently and safely.

Research on Terminal Security and Document Protection System;

The terminal access is the basic element of the model;and some security conditions of access are discussed in detail based on it;it is shown that the security policy and isolation are the root of terminal security.

USB access control solutions can be carried out by the Linux which runs in the secure terminal.

Because the research area of security communication chip lag behind in our country,we put forward a system architecture of a Security Terminal Unit which can introduces the system composition,system manager,principal and subordinate decodor s control structure and system state register.