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  2. Google Authenticator - Wikipedia

    en.wikipedia.org/wiki/Google_Authenticator

    Google Authenticator is a software-based authenticator by Google.It implements multi-factor authentication services using the time-based one-time password (TOTP; specified in RFC 6238) and HMAC-based one-time password (HOTP; specified in RFC 4226), for authenticating users of software applications.

  3. Comparison of OTP applications - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_OTP_applications

    TOTP.APP [27] Web-based authenticator not requiring registration. No Yes Yes Yes Yes Yes No No No No No No No Yubico Authenticator for Desktop [28] By Yubico, for use with Yubikeys. No Yes Yes Yes — — No No Yes Yes Yes No No Yubico Authenticator for Mobile — — — Yes Yes KeePassXC [29] Password manager

  4. Time-based one-time password - Wikipedia

    en.wikipedia.org/wiki/Time-based_One-Time_Password

    To establish TOTP authentication, the authenticatee and authenticator must pre-establish both the HOTP parameters and the following TOTP parameters: T 0, the Unix time from which to start counting time steps (default is 0), T X, an interval which will be used to calculate the value of the counter C T (default is 30 seconds).

  5. Add or disable 2-step verification for extra security - AOL Help

    help.aol.com/articles/2-step-verification...

    4. Select Authenticator app for your 2-step verification method.-To see this option, you'll need to have at least 2 recovery methods on your account . 5. Click Continue. 6. Scan the QR code using your authenticator app. 7. Click Continue. 8. Enter the code shown in your authenticator app. 9. Click Done. Sign in with 2-step for authenticator app. 1.

  6. HMAC-based one-time password - Wikipedia

    en.wikipedia.org/wiki/HMAC-based_one-time_password

    The authenticator's counter continues forward of the value at which verification succeeds and requires no actions by the authenticated. The recommendation is made that persistent throttling of HOTP value verification take place, to address their relatively small size and thus vulnerability to brute-force attacks.

  7. Universal 2nd Factor - Wikipedia

    en.wikipedia.org/wiki/Universal_2nd_Factor

    Universal 2nd Factor (U2F) is an open standard that strengthens and simplifies two-factor authentication (2FA) using specialized Universal Serial Bus (USB) or near-field communication (NFC) devices based on similar security technology found in smart cards.

  8. One-time password - Wikipedia

    en.wikipedia.org/wiki/One-time_password

    MasterCard SecureCode uses OTAC to confirm a user's identity One time authorization code as used in Yammer's desktop client. A one-time password (OTP), also known as a one-time PIN, one-time passcode, one-time authorization code (OTAC) or dynamic password, is a password that is valid for only one login session or transaction, on a computer system or other digital device.

  9. multiOTP - Wikipedia

    en.wikipedia.org/wiki/MultiOTP

    software tokens (like Google Authenticator) hardware tokens (any OATH/HOTP and OATH/TOTP certified token, like NagraID tokens, and some other non-certified but compatible tokens, like Feitian C200 time based tokens) code sent per SMS (since version 4.0.4) scratch passwords list (since version 4.0.4)

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