Overview#

Transaction Authentication Number (TAN) is used by some online banking services as a form of single use One-Time passwords 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 authentication. Should the physical document or token containing the TANs be stolen, it will be of little use without the password; conversely, if the login data are obtained, no transactions can be performed without a valid TAN.

Originally, Transaction Authentication Numbers were printed on a piece of paper and handed by the bank personnel to the end user. Now there are many different methods used for providing Transaction Authentication Numbers.

More Information#

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« This page (revision-5) was last changed on 04-Jun-2016 11:25 by jim