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RandFreeman (talk | contribs) Importing Wikidata short description: "Type of one time password" |
RandFreeman (talk | contribs) Changing short description from "Type of one time password" to "One-time password used in banking" |
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{{Short description|
{{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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