[The] protection of information systems against unauthorized access to or modification of information, whether in storage, processing or transit, and against the denial of service to authorized users, including those measures necessary to detect, document, and counter such threats. [INFOSEC]

The branch of technology devoted to (a) the study and application of data and the processing thereof; i.e., the automatic acquisition, storage, manipulation (including transformation), management, movement, control, display, switching, interchange, transmission or reception of data, and (b) the development and use of the hardware, software, firmware, and procedures associated with this processing.

The European ITSEC represent the harmonized evaluation criteria for secure products and systems for use within the European Community (EC). These criteria encompass both functionality and assurance ("correctness" and "effectiveness") aspects of IT security and form the basic standards against which UK evaluations and certifications are carried out within the UK IT Security Evaluation and Certification Scheme [CESG].

Synonymous with EIP Systems (qv) [CESG].

The process of moving messages containing user information from a source to a sink.
Note: The information transfer rate may or may not be equal to the transmission modulation rate.

The capability associated with the transfer of different types of information through the ISDN. It can be used to characterize a telecommunication service or connection. Values associated with this attribute are unrestricted digital, speech,
3. 1-kHz audio, 7- kHz audio, 15-kHz audio, and video. [T1.603-1990] [T1.604-1990]

Establishment of a communication (signaling) path and any required bearer path between the RPT/RT and the radio port. For example, in TDMA and FDMA, time slots and frequencies are identified, and in CDMA, sequence codes are identified. [T
1. Rpt34-1994]

The operational mode for transferring (transportation and switching) user information through the ISDN. It can be used to characterize a telecommunication service or a connection in the network. Values associated with the attribute are circuit mode and packet mode. [T1.603-1990] [T1.604-1990]

The transfer of digital information between two access points or reference points. Values associated with this attribute are appropriate bit rate (in circuit mode) and throughput rate (in packet mode). [T1.603-1990] [T1.604-1990]

1. A channel capable of transmitting all the information required for communication, such as user data, synchronizing sequences, and control signals.
Note: The information-bearer channel may operate at a higher data rate than that required for user data alone.
2. A basic communications channel with the necessary bandwidth but without enhanced or value-added services.