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Matthiaspaul (talk | contribs) →ChipTAN / Sm@rt-TAN / CardTAN: +anchor for redirects |
RandFreeman (talk | contribs) Importing Wikidata short description: "Type of one time password" |
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{{Short description|Type of one time password}}
{{Other uses|TAN (disambiguation){{!}}Tan}}
A '''transaction authentication number''' ('''TAN''') is used by some [[online banking]] services as a form of ''single use'' [[one-time password]]s (OTPs) to authorize [[financial transaction]]s. TANs are a second layer of security above and beyond the traditional single-password [[Authentication protocol|authentication]].
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