Universal 2nd Factor
Universal 2nd Factor (U2F) is an open authentication standard[1] that strengthens[2] and simplifies[3] two-factor authentication using specialized USB or NFC devices[4] based on similar security technology found in smart cards.[5] While initially developed by Google and Yubico, with contribution from NXP, the standard[6] is now hosted by the FIDO Alliance.[3][7]
U2F security keys can currently be used with Google accounts as a method for two-step verification and is supported by Google Chrome since version 38.[2] As of August 12, 2015, U2F security keys can also be used as an additional method for two-step verification for Dropbox[8] and as of October 1, 2015, for GitHub.[9]
Chrome is currently the only browser supporting U2F natively. Microsoft is working on support for Windows 10[10] and the Edge[11] browser. Mozilla is integrating it into Firefox, and support can currently be enabled through an addon.[12][13]
References
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