1. Of a data or information processing system, a threat of disclosure of information without changing the state of the system.
Note: An example of a passive threat is one that could result in the recovery of sensitive information through the unauthorized interception of a data transmission. [After 2382-pt.8]
2. The threat of unauthorized disclosure of information without changing the… (Read More →)

[A] sequence of characters, longer than the acceptable length of a password, that is transformed by a password system into a virtual password of acceptable length. [INFOSEC-99]

1. [A] Protected/private alphanumeric string used to authenticate an identity or to authorize access to data. [INFOSEC-99]
2. In data communications, a word, character, or combination thereof, that permits access to otherwise inaccessible data, information, or facilities.
3. A character string used for authentication [CESG].
4. Confidential authentication information, usually composed of a string of characters [7498-2].
5. A private… (Read More →)

With respect to a given information system (IS) asset, a log of expired passwords, used primarily for automatic comparison with proposed new passwords. A password history is used to ensure that proposed new passwords were not used in the recent past, if ever, in connection with the IS asset in question. A password history may be limited to only a… (Read More →)

An equation that determines an appropriate password length, M, which provides an acceptable probability, P, that a password will be guessed in its lifetime.
Note: The password length is given by M = (log S)/(log N) where S is the size of the password space and N is the number of characters available. The password space is given by S… (Read More →)

A basic parameter affecting the password length needed to provide a given degree of security.
Note 1: Password length parameters are related by the expression P = LR/S, where P is the probability that a password can be guessed in its lifetime, L is the maximum lifetime a password can be used to log in to a system, R is… (Read More →)

Program Association Table (MPEG)

1. To connect circuits together temporarily.
Note: In communications, patches may be made by means of a cord, i.e., a cable, known as a "patch cord. " In automated systems, patches may be made electronically.
2. In a computer program, one or more statements inserted to circumvent a problem or to alter temporarily or permanently a usually limited aspect or… (Read More →)

A facility in which supporting functions, such as (a) quality control checking and testing of equipment, links, and circuits, (b) troubleshooting, (c) activating, changing, and deactivating of circuits, and (d) technical coordinating and reporting, are performed.

An assembly of hardware so arranged that a number of circuits, usually of the same or similar type, appear on jacks for monitoring, interconnecting, and testing purposes.
Note 1: Patch bays are used at many locations, such as technical control facilities, patch and test facilities, and at telephone exchanges.
Note 2: Patch bays facilitate flexibility in the use, routing or… (Read More →)