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Line 1: '''TAN''' is an acronym formed from the phrase ''~~TransAction~~Transaction Authentication Number''. TANs are being used by some [[online banking]] institutions as a form of ''single use'' [[password]]s to authorise [[financial transaction]]s. TANs are a second layer of security above and beyond the traditional single-password [[authentication]]. An outline of how TANs function:

Transaction authentication number: Difference between revisions