Glossary T

T.A.C.A.C.S.: Stands for: terminal access controller access control system. Remote authentication protocol.

Tamper-resistance: System that is difficult to modify or threaten, even for an attacker with physical access to the system.

Tax Number: A specific number assigned to your business by the State Department of Revenue. The number makes it possible for your business to buy items at wholesale costs and to be exempt from paying state sales tax.

T.C.P.: Stands for: transmission control protocol

T.D.E.S.: Stands for: Triple Data Encryption Standard, also known: as 3DES. Block cipher formed from the DES cipher by using it three times.

TELNET: Telephone network protocol. Generally active to provide user-oriented command line login sessions between hosts on the internet. Program initially designed to emulate a single terminal attached to the other computer.

Terminal Identification Number (TID): An identifying number given to a device/terminal to process transactions.

Thread: A series of messages or postings all related to the same subject or topic. Often times refer to Internet bulletin boards, email lists, and news groups.

Threat: Condition that may cause information or information processing resources to be intentionally or accidentally misplaced, modified, exposed, made inaccessible, or otherwise damaging the organization.

T.L.S.: Stands for: transport layer security. Designed with the goal of providing data secrecy and data integrity between two communicating applications. TLS is successor of SSL.

Token: A tool that performs dynamic authentication.

Toolbar: Sits across the top or down the side of a particular window on a computer screen. The toolbar enables the user to perform certain tasks, such as: opening a file or submitting a print. The toolbar usually can be customized to highlight the tasks most regularly performed.

Transaction Data: Data related to electronic payment.

Transaction Date: The date on which purchase is made or cash is withdrawn. Some companies assess interest on charges and cash advances from the transaction date, others from the posting date (see posting date).

Transaction Fee: A per transaction cost charged to process each transaction.

Truncation: This occurs when you don’t print the full primary account number and expiration date on a receipt.

Commonly, when account numbers are truncated, the first 12 digits are deleted.

Truth in Lending Act: The Truth in Lending Act attempts to inform U.S. consumers about important information regarding credit terms that can assist them in making informed credit choices and should protect them against inaccurate and unfair billing practices. The Truth in Lending Act was amended by, and includes, the Fair Credit Billing Act (see dispute).

Two-factor Authentication: Authentication which requires users to create two credentials to access a system. Credentials consist of something the user has in their possession (for example, smartcards or hardware tokens) and something they know for example, a password). To access a system, the user must create both factors.

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