Cryptographic logic using previous key to produce key. [INFOSEC-99]

The first signal in an MF (multifrequency) outpulsing format; a control signal used to prepare the customer installation (CI) to receive digits. [T1.414-1998]

An input device used to enter data by manual depression of keys, which causes the generation of the selected code element.

Synonym keypunch.

A hidden program in a computer that stores user-typed input or other input and sends this data to the originator. Keyboard recorders are used for stealing user identifications, passwords, and other sensitive information.

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.