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FreeOTP is a free and open-source authenticator by RedHat. It implements multi-factor authentication using HOTP and TOTP. Tokens can be added by scanning a QR code or by manually entering the token configuration. It is licensed under the Apache 2.0 license, and supports Android and iOS. [4] [5] [6]
An authenticator that implements CTAP2 is called a FIDO2 authenticator (also called a WebAuthn authenticator). If that authenticator implements CTAP1/U2F as well, it is backward compatible with U2F. The protocol uses the CBOR binary data serialization format. The standard was adopted as ITU-T Recommendation X.1278. [6] [1]
Account recovery typically bypasses mobile-phone two-factor authentication. [2] [failed verification] Modern smartphones are used both for receiving email and SMS. So if the phone is lost or stolen and is not protected by a password or biometric, all accounts for which the email is the key can be hacked as the phone can receive the second factor.
Both the authenticator and the authenticatee compute the TOTP value, then the authenticator checks whether the TOTP value supplied by the authenticatee matches the locally generated TOTP value. Some authenticators allow values that should have been generated before or after the current time in order to account for slight clock skews , network ...
If you are not in one of these groups, you need to submit a request at m:Steward requests/Global permissions#Requests for 2 Factor Auth tester permissions to obtain access to 2FA (see request examples), explicitly mentioning that you have read Help:Two-factor authentication on Meta (which is not the page you're reading now).
Sign in and go to the AOL Account security page. Under "2-Step Verification," click Turn on. Click Security Key. Follow the onscreen steps to add your Security Key. Add additional recovery methods in case your Security Key is lost.
The Google Authenticator app for Android was originally open source, but later became proprietary. [11] Google made earlier source for their Authenticator app available on its GitHub repository; the associated development page stated: "This open source project allows you to download the code that powered version 2.21 of the application.
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