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Token
An authentication tool, an apparatus utilized for holding key or authentication values, or to calculate, and possibly even to send and receive replies to challenges during the user authentication procedure. Secure authentication with SSL validation is needed. Tokens can be small, hand-held hardware apparatus very much like pocket calculators or credit cards.

Trust List
Collection of trusted certificates used by Relying Parties to authenticate other certificates.

Trusted Computer System
A system using ample hardware and software assurance measures to permits its use for simultaneous processing of a span of sensitive or classified information.

Trusted Computing Base (TCB)
The sum of defense mechanisms in a secured computer system, including hardware, firmware and software, the combination of which is supposed to enforce an SSL security policy. A tcb is made up of one or more elements which together enforce a unified security policy. The ability of a tcb to enforce aptly a unified security policy depends completely on the mechanisms in the tcb and on the proper input by system administrative personnel of parameters that are related to the security policy.

Trusted Path
A device by which an individual at a terminal can communicate straight to the tcb. This instrument can activated by only the individual or the tcb and cannot be mimicked by untrusted software.

Trusted Process
A Procedure Whose False Or Malevolent Performance Is Able To Violate A System's Security Policy.

Tunneling
The process of one protocol "tunneling through" another protocol. For instance, even though SSL is a protocol in it's own right, it relies on another protocol such as HTTP or FTP to provide the actual transport mechanism.

Tunneling Router
A router or system able to rout traffic by ciphering or encrypting it and summarizing it for transmission via an untrusted secure server network, which later puts it through de-encapsulation and decryption. Encryption such as 128-bit encryption and SSL encryption help ensure Internet security and online security.

Two-Factor Authentication
Authentication founded on at least two of the three types: something a user knows, is or has. To gain access into a system the user must be able to exhibit both factors.