The benefits of information security-protecting computer systems and networks-are inherently invisible: if threats have been averted, things work as normal.
信息安全的利益在于——保护计算机系统和网络——具有其余生俱来的的不可见属性：如果危险已经转移，则一切都会正常工作。
Many authorization models have been proposed to ensure information security of computer systems.
人们已经提出了一些授权模型，以保证计算机系统的信息安全。
They study computer systems, telecommunications, information security, budgeting, and more.
他们学习计算机系统，电信，信息安全，预算等。
Before 1970, in order to protect the information security in computer systems, mandatory and discretionary access control policy had been widely applied in secure computer systems.
在上世纪七十年代以前，为保证计算机系统中的信息安全性，自主存取控制和强制存取控制策略在计算机多安全级系统中得到了广泛的应用。
The security product components for computer information systems. Part 1:Security function …
计算机信息系统安全产品部件。第1部分： 安全功能检测 。
The security product components for computer information systems. Part 1:Security function …
计算机信息系统安全产品部件。第1部分： 安全功能检测 。
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