1. The generating of signals by the interruption or modulation of a steady signal or carrier.
2. See chroma keying.

1. In encryption, the data (e.g., keys, certificates, and initialization vectors) necessary to establish and maintain cryptographic keying relationships. [After X9.24]
2. [A] key, code, or authentication information in physical or magnetic form. [INFOSEC-99]

The state existing between two parties such that they share at least one cryptographic key. [After X9.17]

Deprecated synonym for key.

Historically, a keyboard-actuated punch that punches holes in a data medium. Synonym keyboard punch.

With respect to data entry via a keyboard, determination of the accuracy of data entry by the re-entry of the same data through the same (or another) keyboard. [After 2382-pt.8]

Abbreviation for kilohertz.

Slang contraction of killer application. A successful and popular software application (often written by a third party), that is generally perceived to be superior in function or that employs the latest and most impressive techniques.

A trunk that is seized repeatedly, but is not held for an appreciable length of time due to a malfunction. Within a group these trunks have higher than average attempt rates and shorter than normal holding times.

A unit of frequency denoting one thousand (103) Hz.