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1. In image processing, a sub-region of an image that is perceived as a single entity. Note: An image can contain more than one object. 2. In facsimile systems, the image, the likeness of which is to be transmitted. 3. [A] Passive entity containing or receiving information. Access to an object implies access to the information it contains. [INFOSEC-99] 4. A passive entity within a system that contains or receives information [CESG]. Examples: records, blocks, pages, segments, files, etc. Note: [1] Access to an object implies potential access to the information it contains. [2] An entity (e.g. a program) may be both a subject and an object. Which it is depends on consideration of the type of access in which it participates. [3] The range of valid objects is restricted by the available types of operations that can be performed, e.g. read, write, execute, etc. See also: Subject. 5. Abbreviation of security object [ECMATR46]. 6. A passive entity that contains or receives information [ITSEC]. 7. A passive entity that contains or receives information. Access to an object potentially implies access to the information that it contains. Examples of items that may be considered objects are: records, blocks, pages, segments, files, directories, directory trees, and programs, as well as bits, bytes, words, fields, processors, video displays, keyboards, clocks, printers, network nodes, etc[POSIX.6]. 8. A passive entity that contains or receives information. Access to an object potentially implies access to the information it contains. Examples of objects are: records, blocks, pages, segments, files, directories, directory trees and programs, as well as bits, bytes, words, fields, processors, video displays, keyboards, clocks, printers, network nodes, etc [TCSEC].
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1. Pertaining to, or characteristic of, a computer program consisting of (a) many relatively small, simple programs (subroutines), and (b) one monitor program, the function of which is to coordinate the exchange of data among the subroutines. Note: Subroutines designed under this concept may be stored in object libraries, and used by other computer programmers with similar functional requirements. 2. Pertaining to, or characteristic of, data to be processed by object-oriented programs. Note 1: Each data object in an object-oriented program may have multiple attributes associated with it. For example, if a data object were defined as a person, several appropriate attributes might be the person's birth date, social security number, and eye color. Note 2: The data and its attributes are considered as one object as they pass between subroutines. Note 3: Objects with similar attributes are considered as a particular class of objects. For example, "people" would be one class of objects and "automobiles" could be another, because the objects in the "automobiles" class are likely to have a completely different set of attributes associated with them.
- Browse Related Terms: Abstraction, access category, application software, controlled access, explicit services, object oriented, opaque data objects, open system application program interface, platform, programming language API, resource controller (RC), transaction, transaction application program
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In a video display, distortion wherein the entirety of some object (or objects) that appeared in a previous frame (and that should no longer appear) remain in the current frame and in subsequent frames as a faded image or as an outline.
- Browse Related Terms: active video frame identification, b frame, camcorder, frame grabber, frame matching, motion compensation, motion response degradation, normal resolution still image, object persistence, object retention, scene cut, video imagery, videoconference
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In a video display, distortion in which a fragment of an object that appeared in a previous frame (and should no longer appear) remains in the current and subsequent video frames.
- Browse Related Terms: active video frame identification, b frame, camcorder, frame grabber, frame matching, motion compensation, motion response degradation, normal resolution still image, object persistence, object retention, scene cut, video imagery, videoconference
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1. Reassignment and re-use of a storage medium containing one or more objects after ensuring no residual data remains on the storage medium. [INFOSEC-99] 2. Reuse of a storage medium for a different object [CESG]. Note: [1] A vulnerability may exist if the medium contains residual data from a previous object. [2] This is now the accepted term, despite the fact that it is the storage medium, not the object, that is reused. See also: Purge. 3. The reassignment to some subject of a medium (e.g., page frame, disk sector, magnetic tape) that contained one or more objects. To be securely reassigned, such media must contain no residual data from the previously contained object(s) [TCSEC].
- Browse Related Terms: access period, access permission, access profile, Availability, Bell-La Padula security model, Confidentiality, MAC label, object reuse, read, reference monitor concept, reference monitoring, remanence, scanning spot, secure state, secure subsystem, Security Level, TCB subset [FC Ver 1.0 Dec 1992], Ticket, ticket-oriented, tranquility, write
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In cryptography, pertaining to the state of a key that must no longer be used either to transmit information from the originator or to process received secure information. [After X9.17]
- Browse Related Terms: compromised obsolete, exhaustive attack, FIREFLY, MD5 (Message Digest Algorithm #5), nonce, obsolete, perfect forward secrecy, polyinstantiation, public-key traceability, security enforcing
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In encryption, the date and time when a key becomes obsolete. [After X9.17]
- Browse Related Terms: asymmetric encryption, COMSEC control program, cooperative key generation, end-to-end encryption, master key, obsolete date, off-line cryptosystem, offset encryption, on-line cryptosystem, one-time pad, over-the-air key transfer, over-the-air rekeying (OTAR), per-call key, PGP, private key, Public Key Cryptography, public-key encryption, secret key encryption, session key, start-up KEK, subscriber key, symmetric cryptography, system indicator, system key, traffic encryption key (TEK), translate
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Abbreviation for optical carrier. The nomenclature for the line rate of the optical transmission signal. [T1.106-1988]
- Browse Related Terms: carrier dropout, characteristic frequency, Modulation, modulator, OC, quieting, T1 (carrier), T1C (carrier), T2 (carrier), T3 (carrier), T4 (carrier), T5 (carrier), Utilization Level
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For equipment, such as a circuit or a switch, the ratio of the actual time in use to the available time during a 1-hour period. Note 1: Occupancy is usually expressed in percent. Note 2: Occupancy may be plotted versus time of day. Synonym usage.
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The width of a frequency band such that, below the lower and above the upper frequency limits, the mean powers emitted are each equal to a specified percentage B/2 of the total mean power of a given emission. Unless otherwise specified by the CCIR for the appropriate class of emission, the value of B/2 should be taken as 0.5%. [NTIA] [RR] Note 1: The percentage of the total power outside the occupied bandwidth is represented by B. Note 2: In some cases, e.g., multichannel frequency-division multiplexing systems, use of the 0.5% limits may lead to certain difficulties in the practical application of the definition of occupied and necessary bandwidth; in such cases, a different percentage may prove useful. 2. The frequency bandwidth such that, below its lower and above its upper frequency limits, the mean powers radiated are each equal to 0.5% of the total mean power radiated by a given emission. [47CFR]
- Browse Related Terms: assigned frequency band, authorized bandwidth, Barrage Jamming, coordination area, nominal bandwidth, occupied bandwidth, radio channel, reference frequency, rf bandwidth, spectral density, spurious emission, wideband
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A station in the maritime mobile service the emissions of which are used to initiate, modify or terminate functions of equipment directly associated with an oceanographic data station, including the station itself. [NTIA]
- Browse Related Terms: aeronautical Earth station, base Earth station, base station, coast Earth station, coast station, emergency position-indicating radiobeacon station, oceanographic data interrogating station, oceanographic data station, on-board communication station, port operations service, radiobeacon station, satellite emergency position-indicating radiobeacon, ship Earth station, survival craft station
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A station in the maritime mobile service located on a ship, buoy, or other sensor platform the emissions of which are used for transmission of oceanographic data. [NTIA]
- Browse Related Terms: aeronautical Earth station, base Earth station, base station, coast Earth station, coast station, emergency position-indicating radiobeacon station, oceanographic data interrogating station, oceanographic data station, on-board communication station, port operations service, radiobeacon station, satellite emergency position-indicating radiobeacon, ship Earth station, survival craft station
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An Operating Company Number (OCN) is a four place alphanumeric code that uniquely identifies providers of local telecommunications service. OCN assignments are required of all SPs in their submission of utilization and forecast data (FCC 00-104, ö 41 and Public Notice DA 00-1549). Relative to CO Code assignments, NECA assigned Company Codes may be used as OCNs.
- Browse Related Terms: Administrative Numbers:, OCN, Pooling Administrator (PA), Reclamation, Reporting Carrier, Service Management Team (SMT), service provider
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A byte of eight binary digits usually operated upon as an entity.
- Browse Related Terms: access path, arithmetic unit, clock free-run mode, communications net operation, error signal, fail-safe operation, flops, mudbox, nontechnical load, octet, preset jammer, priority message, proprietary standard, RBOC, separations, slip-free operation, technical load, tracking mode, transparent interface, unavailability, undesired signal
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The configuration of a field composed of an integral number of octets. Note: If the field is not divisible by eight, bits (usually zeros) are added to either the first octet (left justification) or the last octet (right justification).
- Browse Related Terms: extended superframe (ESF), Frame, frame-alignment signal, octet alignment, QRS, quasi-random signal (QRS), superframe (SF), time-division switching
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Abbreviation for optical density.
- Browse Related Terms: AC, AMI, app, ATM, B, b/s, basecom, BCI, Bd, BOC, BW, C.O., CAD, CATV, CCS, COG, EO, EOW, ESD, ESF, FC, FEP, FIFO, FILO, FO, MFD, MFJ, MHz, MTA, mw, NA, nmi, Np, NPA, NVIS, OD, OPX, OTAR, PLA, PLS, POT, PPP, RAD, RI, RJ, RO, RQ, RSL, RX, s, sr, STP, SX, THD, TLM, TLP, TRANSEC, TX, uv, VNL, XO, XT
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Synonym parity check.
- Browse Related Terms: continuity check transponder, even parity, false character, frame check sequence (FCS), odd parity, odd-even check, reasonableness check, smart jack, sum check, summation check, vertical redundancy check (VRC), wild-point detection
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See parity, parity check.
- Browse Related Terms: continuity check transponder, even parity, false character, frame check sequence (FCS), odd parity, odd-even check, reasonableness check, smart jack, sum check, summation check, vertical redundancy check (VRC), wild-point detection