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2. Transaction authentication number - Wikipedia

   en.wikipedia.org/wiki/Transaction_authentication...

   A transaction authentication number ( TAN) is used by some online banking services as a form of single use one-time passwords (OTPs) to authorize financial transactions. TANs are a second layer of security above and beyond the traditional single-password authentication . TANs provide additional security because they act as a form of two-factor ...

3. United States Uniformed Services Privilege and Identification ...

   en.wikipedia.org/wiki/United_States_Uniformed...

   A United States Uniformed Services Privilege and Identification Card (also known as U.S. military ID, Geneva Conventions Identification Card, or less commonly abbreviated USPIC) is an identity document issued by the United States Department of Defense to identify a person as a member of the Armed Forces or a member's dependent, such as a child ...

4. 3-D Secure - Wikipedia

   en.wikipedia.org/wiki/3-D_Secure

   3-D Secure. Not to be confused with card security code. 3-D Secure is a protocol designed to be an additional security layer for online credit and debit card transactions. The name refers to the "three domains" which interact using the protocol: the merchant/acquirer domain, the issuer domain, and the interoperability domain. [1]

5. What Is a Credit Card Security Code and Why Is It Important?

   www.aol.com/credit-card-security-code-why...

   A card security code is a three- or four-digit number on the back of credit and debit cards that ensures the authenticity of transactions when a physical card is not presented at the point of sale ...

6. How to find your credit card's security code - AOL

   www.aol.com/2010/06/24/how-to-find-your-credit...

   Another important thing to remember is that while websites and order forms will call your credit card's security code one of the following 5 abbreviations; CSC, CVV, CV2, CVC or CCV, they are all ...

7. Security token - Wikipedia

   en.wikipedia.org/wiki/Security_token

   A security token is a peripheral device used to gain access to an electronically restricted resource. The token is used in addition to, or in place of, a password. [1] Examples of security tokens include wireless keycards used to open locked doors, a banking token used as a digital authenticator for signing in to online banking, or signing a ...