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Z English

$ zero-knowledge proof

(I) /cryptography/ A proof-of-possession protocol whereby a system entity can prove possession of some information to another entity, without revealing any of that information. (See: proof-of- possession protocol.)

$ zeroize

1. (I) Synonym for "erase". (See: sanitize.) Usage: Particularly with regard to erasing keys that are stored in a cryptographic module.

2. (O) Erase electronically stored data by altering the contents of the data storage so as to prevent the recovery of the data. [FP140]

3. (O) "To remove or eliminate the key from a cryptoequipment or fill device." [C4009]

Usage: The phrase "zeroize the device" normally is used to mean erasing all keys stored in the device, but sometimes means erasing all keying material in the device, or all cryptographic information in the device, or even all sensitive information in the device.

$ zombie

(I) /slang/ An Internet host computer that has been surreptitiously penetrated by an intruder that installed malicious daemon software to cause the host to operate as an accomplice in attacking other hosts, particularly in distributed attacks that attempt denial of service through flooding.

Deprecated Usage: Other cultures likely use different metaphorical terms (such as "robot") for this concept, and some use this term for different concepts. Therefore, to avoid international misunderstanding, IDOCs SHOULD NOT use this term. Instead, use "compromised, coopted computer" or other explicitly descriptive terminology. (See: Deprecated Usage under "Green Book".)

$ zone of control

(O) /EMSEC/ Synonym for "inspectable space". [C4009] (See: TEMPEST.)

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