Centralized Resources Over Wide Area Network

Cathode Ray Tube

1. Operations performed in converting encrypted messages to plain text without initial knowledge of the crypto-algorithm and/or key employed in the encryption. [INFOSEC-99]
2. The study of encrypted texts.
3. The analysis of a cryptographic system and/or its inputs and outputs to derive confidential variables and/or sensitive data including cleartext[7498-2].

Synonym (in cryptography) analytical attack.

[The] marking or designator identifying COMSEC keying material used to secure or authenticate telecommunications carrying classified or sensitive U. S. Government or U. S. Government-derived information. [INFOSEC-99]
Note: When written in all upper case letters, CRYPTO has the meaning stated above. When written in lower case as a prefix, crypto and crypt are abbreviations for cryptographic. [NIS]

Deprecated term. See key.

[A] circuit or device that detects failures or aberrations in the logic or operation of crypto-equipment. [A] crypto-alarm may inhibit transmission or may provide a visible and/or audible alarm. [INFOSEC-99]

[A] well-defined procedure or sequence of rules or steps, or a series of mathematical equations used to describe cryptographic processes such as encryption/decryption, key generation, authentication, signatures, etc. [INFOSEC-99]

Equipment designed specifically to facilitate efficient or reliable operation of crypto-equipment, without performing cryptographic functions itself. [INFOSEC-99]

Seecryptographic equipment.