1. Security testing in which evaluators attempt to circumvent the security features of a system based on their understanding of the system design and implementation. [INFOSEC-99]
2. Tests performed by an evaluator on the Target of Evaluation in order to confirm whether or not known vulnerabilities are actually exploitable in practice[ITSEC].
3. The portion of security testing in which the… (Read More →)

1. Deprecated abbreviation for peak envelope power. Either "PX" or "pX" is now preferred. See peak envelope power, yypower.
2. Policy Enforcement Point.

[A] unique traffic encryption key generated automatically by certain secure telecommunications systems to secure single voice or data transmissions. [INFOSEC-99]

In pulsed telephone signaling (dialing), the ratio, expressed in percent, of (a) the open-circuit (break) time to (b) the sum of the open- and closed-circuit times of a single dial pulse cycle.
Note: For example, at a pulse rate of 10 per second, the pulse period is 100 milliseconds. If, during each pulse period, the equipment generating the dial pulses… (Read More →)

1. In angle modulation, the fraction of a specified reference modulation, expressed in percent.
2. In amplitude modulation, the modulation factor expressed in percent.
Note: Percentage modulation may also be expressed in dB below 100% modulation.

In cryptography, of a key-establishment protocol, the condition in which the compromise of a session key or long-term private key after a given session does not cause the compromise of any earlier session.

A measure of a computer system or subsystem to perform its functions; for example, response time, throughput, number of transactions per second [POSIX.0].

A discrepancy between actual and desired characteristics of an item. An anomaly may or may not affect the ability of an item to perform a required function. [T1.503-1996]

The technical assessment of a system or system component to determine how effectively operating objectives have been achieved [POSIX.0].

In network management, (a) a set of functions that evaluate and report the behavior of telecommunications equipment and the effectiveness of the network or network element and (b) a set of various subfunctions, such as gathering statistical information, maintaining and examining historical logs, determining system performance under natural and artificial conditions, and altering system modes of operation.