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  2. Google Authenticator - Wikipedia

    en.wikipedia.org/wiki/Google_Authenticator

    Google Authenticator is a software-based authenticator by Google. ... when the user opens the Authenticator app, it calculates an HMAC-SHA1 hash value using this ...

  3. Comparison of OTP applications - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_OTP_applications

    Online sync. Free and open source app for Android to manage your 2-step verification tokens. [ 1] Open Source Cross platform password manager. 2FA is a premium feature. [ 2] Free and open source app for Android and iOS to manage your 2-step verification tokens. [ 4] Cross-platform 2FA Authenticator with TOTP & HOTP generator with sharing ...

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

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

    Call live aol support at. 1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more. Add or disable 2-step verification for extra security. Add an extra security step to sign into your account with 2-step verification. Find out how to turn on 2-step verification and receive a ...

  5. Time-based one-time password - Wikipedia

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

    Time-based one-time password. Time-based one-time password ( TOTP) is a computer algorithm that generates a one-time password (OTP) using the current time as a source of uniqueness. As an extension of the HMAC-based one-time password algorithm (HOTP), it has been adopted as Internet Engineering Task Force (IETF) standard RFC 6238. [ 1] TOTP is ...

  6. What is Two-Factor Authentication? - AOL

    www.aol.com/two-factor-authentication-120048004.html

    If you are looking for a third-party authentication app, we recommend checking out Google Authenticator, LastPass Authenticator, Microsoft Authenticator, and Twilio Authy. A Two-Factor ...

  7. HMAC-based one-time password - Wikipedia

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

    HMAC-based one-time password ( HOTP) is a one-time password (OTP) algorithm based on HMAC. It is a cornerstone of the Initiative for Open Authentication (OATH). HOTP was published as an informational IETF RFC 4226 in December 2005, documenting the algorithm along with a Java implementation. Since then, the algorithm has been adopted by many ...

  8. Passwordless authentication - Wikipedia

    en.wikipedia.org/wiki/Passwordless_authentication

    Passwordless authentication. Passwordless authentication is an authentication method in which a user can log in to a computer system without the entering (and having to remember) a password or any other knowledge-based secret. In most common implementations users are asked to enter their public identifier (username, phone number, email address ...

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