1. The time span during which a specific key is authorized or in which the keys for a given system remain in effect. [After X9.31]
2. [The] time span during which each key setting remains in effect. [INFOSEC-99]

See communications security.

[The] process by which a receiving decrypting cryptographic logic attains the same internal state as the transmitting encrypting logic. [INFOSEC-99]

Associated COMSEC items interacting to provide a single means of encryption or decryption. [INFOSEC]

An oscillator in which the frequency is controlled by a piezoelectric crystal.
Note 1: A crystal oscillator may require controlled temperature because its operating frequency is a function of temperature.
Note 2: Types of crystal oscillators include voltage-controlled crystal oscillators (VCXO), temperature-compensated crystal oscillators (TCXO), oven-controlled crystal oscillators (OCXO), temperature-compensated-voltage controlled crystal oscillators (TCVCXO), oven-controlled voltage-controlled crystal oscillators (OCVCXO), microcomputer-compensated… (Read More →)

1. Classification Scheme,
2. Circuit-Switched.

Call Session Control Function

Abbreviation for carrier sense multiple access.

Abbreviation for carrier sense multiple access with collision avoidance.

Abbreviation for carrier sense multiple access with collision detection.