(J0), a single byte or a sequence of bytes, used to transmit a unique message so that the receiving terminal in a section can verify it is connected to the intended transmitter.

A predetermined, addressable angular part of a track or band on a magnetic drum or magnetic disk.

A copy-protection technique for copy protection that determines whether a diskette is an unauthorized copy by checking whether sectors are positioned properly from track to track. [2382-pt.8]

In magnetic or optical disk storage media, the division of tracks into a specified number of segments, for the purpose of organizing the data stored thereon.

Telecommunications deriving security through use of type 1 products and/or protected distribution systems. [INFOSEC-99]

[The] specification for a secure hash algorithm that can generate a condensed message representation called a message digest. [INFOSEC-99]

Resident software controlling hardware and other software functions in an information system (IS) to provide a level of protection or security appropriate to the classification, sensitivity, and/or criticality of the data and resources it manages. [INFOSEC-99]

[The] condition in which no subject can access any object in an unauthorized manner. [INFOSEC-99]

[A] Subsystem containing its own implementation of the reference monitor concept for those resources it controls. Secure subsystem must depend on other controls and the base operating system for the control of subjects and the more primitive system objects. [INFOSEC-99]

See STU.