triple data encryption algorithm (TDEA)An encryption algorithm whose key consists of three DES (Data Encryption Standard) keys, which is also referred to as a key bundle.
Triple DESAn implementation of the Data Encryption Standard (DES) algorithm that uses three passes of the DES algorithm instead of one as used in ordinary DES…
triple precisionCharacterized by the use of three computer words to represent a number in accordance with required precision.
tripletA sequential group of three nucleotides in DNA or RNA. See: codon.
tristimulus valuesIn a given trichromatic system, the amounts of the three reference color stimuli required to match the light considered in a given chromatic system.
TRN(1) Task Requirements Notice. (2) Test Requirements Notification.
troffA venerable typesetting language from which Perl derives the name of its 0 variable and which is secretly used in the production of Camel books.
Trojan horseA computer program with an apparently or actually useful function that contains additional (hidden) functions that surreptitiously exploit the legitimate…
TropopauseThe upper boundary of the troposphere, usually characterized by an abrupt change in lapse rate from positive (decreasing temperature with height) to…
Tropospheric ScatterThe propagation of electromagnetic waves by scattering as a result of irregularities in the physical properties of the troposphere.
tropospheric waveA radio wave that is propagated by reflection from a place of abrupt change in the dielectric constant, or its gradient, in the troposphere.
TRP(1) Test Readiness Program. (2) Technology Reinvestment Program. (3) Technology Readiness Program (pre-acquisition program status).
trueAny scalar value that doesn't evaluate to 0 or "".
True Accept RateA statistic used to measure biometric performance when operating in the verification task.
True PowerThe actual power rating that is developed by a motor before losses occur.
True Reject RateA statistic used to measure biometric performance when operating in the verification task.
truncateThe act of cutting off the decimal point and number to its right. This does not include rounding The act of shortening or abbreviating by cutting off the…
truncated binary exponential backoffIn carrier sense multiple access with collision avoidance (CSMA/CA) networks and in carrier sense multiple access with collision detection (CSMA/CD)…
truncatingEmptying a file of existing contents, either automatically when opening a file for writing or explicitly via the truncate function.
truncationThe deletion or omission of a leading or a trailing portion of a string in accordance with specified criteria.
truncation errorIn the representation of a number, the error introduced when one or more digits are dropped.
trunkIn a communications network, a single transmission channel between two points that are switching centers or nodes, or both. 2.
trunk encryption device (TED)A bulk encryption device used to provide secure communications over a wideband digital transmission link.
Trunk GatewayThe Trunk Gateway provides an access interface between traditional Public Switched Telephone Network (PSTN) circuit-based networks and packet networks.
trunk groupTwo or more trunks of the same type between two given points.
trunk group multiplexer (TGM)A time-division multiplexer that combines individual digital trunk groups into a higher rate bit stream for transmission over wideband digital…
TrustA fiduciary relationship in which a person, called a trustee, holds title to property for the benefit of another person, called a beneficiary.
Trust AnchorA public key and the name of a certification authority that is used to validate the first certificate in a sequence of certificates.
Trust ListThe collection of trusted certificates used by Relying Parties to authenticate other certificates.
trust relationshipA logical relationship established between domains to allow pass-through authentication, in which a trusting domain honors the logon authentications of a…
Trusted AgentEntity authorized to act as a representative of an Agency in confirming Subscriber identification during the registration process.
trusted appletAn applet with more privileges than an ordinary (untrusted) applet.
trusted CAs directoryThe directory containing the CA certificates and signing policy files of the CAs trusted by GSI.
Trusted CertificateA certificate that is trusted by the Relying Party on the basis of secure and authenticated delivery.
trusted computer system (TCS)1. [An] information system (IS) employing sufficient hardware and software assurance measures to allow simultaneous processing of a range of classified or…
Trusted Computer System/SoftwareA system or its software that employs sufficient hardware and software integrity measures to allow its use for processing sensitive or classified…
trusted computing base (TCB)1. [ The] totality of protection mechanisms within a computer system , including hardware , firmware , and software , the combination of which is…
Trusted Computing GroupThe organization that sets standards for Trusted Platform Module (TPM) use and interface.
trusted distribution[A] method for distributing trusted computing base (TCB) hardware, software, and firmware components that protects the TCB from modification during…
trusted functionA function whose correct operation is relied upon for the security policy to be upheld [CESG].
trusted functionalityThat which is perceived to be correct with respect to some criteria, e.g., as established by a security policy [7498-2].
trusted identification forwarding[The] identification method used in information system (IS) networks whereby the sending host can verify an authorized user on its system is attempting a…
trusted loginA user is said to have a trusted login to another computer when that user is not prompted for a password when accessing the remote computer.
trusted networkThe subnetwork formed by an association of interconnected Trusted Network Interface Units and one or more Access control Systems [CESG].
trusted network interface unit (TNIU)TNET (see Trusted Network above) will be realized by the development of a number of components including the TNIU and ACS.
Trusted PathA mechanism by which a person at a terminal can communicate directly with the Trusted Computing Base.
Trusted Platform ModuleSecurity hardware that provides a hardware-based root of trust and can be leveraged to provide a variety of cryptographic services, such as early-boot…
trusted process[A] process that has privileges to circumvent the system security policy and has been tested and verified to operate only as intended. [INFOSEC-99]
trusted recovery1. [The] ability to ensure recovery without compromise after a system failure. [INFOSEC-99] 2.
trusted regionPart of a system that contains trusted functions [CESG].
trusted rootA certificate authority's certificate merged into the Domino Directory, client's browser, or the server's key ring file, which allows clients and servers…
trusted software1. [The] software portion of a trusted computing base (TCB). [INFOSEC-99] 2. The software portion of a Trusted Computing Base [TCSEC].
trusted third-party1. A security authority trusted by communicating entities with respect to specific security-related activities ( e.g., for the purpose of authentication).
Trusted TimestampA digitally signed assertion by a trusted authority that a specific digital object existed at a particular time.
TrustRankSearch relevancy algorithm which places additional weighting on links from trusted seed websites that are controlled by major corporations, educational…
TrustworthinessThe attribute of a person or organization that provides confidence to others of the qualifications, capabilities, and reliability of that entity to…
Trustworthy SystemComputer hardware, software and procedures that 1) are reasonably secure from intrusion and misuse; 2) provide a reasonable level of availability…
truth tableAn operation table for a logic operation. 2. A table that describes a logic function by listing all possible combinations of input values and indicating…
TS CALA license that is required for a user or a device to connect to a terminal server.
TS CAPA policy that allows the administrator to specify who can connect to a TS Gateway server.
TS GatewayA role service that enables authorized remote users to connect to resources on an internal corporate or private network, from any Internet-connected…
TS Gateway ManagerA Microsoft Management Console (MMC) console on a TS Gateway server that administrators can use to configure Terminal Services connection authorization…
TS Gateway serverA server on which the Terminal Services Gateway role service is installed. Users connect to network resources on an internal corporate or private network…
TS Gateway server farmA group of TS Gateway servers that have been configured to function correctly using a load balancing solution that is in place.
TS Gateway-managed computer groupA list of network resources (computers) on an internal corporate or private network that users can access through a TS Gateway server.
TS Licensing ManagerTerminal Services management tool for installing, issuing, and monitoring Terminal Services client access licenses (TS CALs) on a Terminal Services…
TS Per Device CALOne of the two types of Terminal Services client access licenses (TS CALs) that permits one device (used by any user) to connect to a terminal server.
TS Per User CALOne of the two types of Terminal Services client access licenses (TS CALs) that permits one user to access terminal servers from an unlimited number of…
TS RemoteAppA feature in Windows Server 2008 that enables the user to access a program remotely through Terminal Services but have it appear as if it is running on…
TS Session BrokerA Terminal Services role service in Windows Server 2008 that enables a user to load balance sessions in a terminal server farm.
TS Web AccessA Terminal Services role service that makes RemoteApp programs and a connection to the terminal server's desktop accessible to users from a Web browser.
TS Web Access AdministrationAn option on the Administrative Tools menu that opens the TS Web Access Web site for administrative purposes.