This paper explores the hierarchy protection on the national computer information system.
介绍了国家的计算机信息系统安全等级保护。
The control system of security interlocking protection consisting of PLC and upper computer is introduced.
介绍了由PLC及上位机组成的安全联锁保护控制系统。
This system is a kind of computer security protection software based on the USB key.
本文首先阐述了桌面保护系统的应用背景及重要实践意义；
This system is a kind of computer security protection software based on the USB key.
本文首先阐述了桌面保护系统的应用背景及重要实践意义；
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