System high

A system is operating at system high security mode when the system and all of its local and remote peripherals are protected in accordance with the requirements for the highest classification category and types of material contained in the system. All users having access to the system have a security clearance, but not necessarily a needtoknow for all material contained in the system. In this mode, the design and operation of the system must provide for the control of concurrently available classified material in the system on the basis of needtoknow. Highest security level supported by an information system.