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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.
Click the + button at the top-left of Authenticator. Add the secret 2FA key to Authenticator using either one of these methods: Use Authenticator to take a screenshot of the QR code: Click the QR code button at the top-right of Authenticator. Position your pointer before the top-left corner of the QR code from "Step 2" of the 2FA setup page.
If you no longer have your Security Key, use these steps: Go to the Sign-In Helper. Sign in and go to the AOL Account Security page. Turn off Security Key 2-Step Verification. When you get your Security Key back or get a new key, you can re-enable 2-Step Verification in your Account Security settings.
Download an authenticator app from the Google Play Store or App Store. Popular authenticator apps include Google Authenticator, Microsoft Authenticator, LastPass Authenticator, and Authy. Enable 2-step for authenticator app. Important - You may not see this option as it yet available for all accounts. 1. Sign in to your Account Security page. 2.
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.
A secret key K, which is an arbitrary byte string and must remain private; A counter C, which counts the number of iterations; A HOTP value length d (6–10, default is 6, and 6–8 is recommended) Both parties compute the HOTP value derived from the secret key K and the counter C. Then the authenticator checks its locally generated value ...
Yubico Authenticator for Mobile — — — Yes Yes KeePassXC [29] Password manager Through user setup with Syncthing, [30] or only within the KeeWeb [31] online web App [32] Yes Yes Yes No KeePassDX [33] No No Yes Yes Yes No Yes 2FAS [34] Popular, feature rich open-source two-factor authenticator. No account required. Online backup/sync via ...
In cryptography, a shared secret is a piece of data, known only to the parties involved, in a secure communication. This usually refers to the key of a symmetric cryptosystem . The shared secret can be a PIN code , a password , a passphrase , a big number, or an array of randomly chosen bytes.