(Fast IDentity Online Alliance) A consortium of hardware, software and financial services companies founded in 2013 to create authentication standards. In late 2014, two protocols were released that use public key cryptography: the non-password Universal Authentication Framework (UAF), which uses a fingerprint biometric, and the Universal Second Factor (U2F), which relies on additional proof such as a USB dongle. A Private/Public Key Pair Is Generated When users register with a compliant website, a private key is generated in their device, and the public key counterpart is retained by the site. Authentication is provided when the user's device signs a challenge from the site. See digital signature and public key cryptography.