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A USB or a USB-C to insert the security key or you can connect it wirelessly using Bluetooth or NFC. The latest version of Chrome, Edge, Firefox, Safari or Opera. A FIDO Universal 2nd Factor (U2F) compatible security key that can plug into the USB or lightning port for your device or connect wirelessly using Bluetooth or NFC.
Authenticator apps provide secure verification codes that act as the second step in 2-step verification. After entering your password, you'll need to enter the code generated by your authenticator app to sign in. How do I get an authenticator app? Download an authenticator app from the Google Play Store or App Store.
If there's something unusual about your sign in or recent activity, we'll ask you to go through another verification step after you've entered the correct password.
The third version, though, is one that uses a physical hardware key. This is a literal key FOB that you would put on your keychain. And it'll provide you with a number for that one-time use ...
Two-factor authentication is a special case of multi-factor authentication involving exactly two factors. [3] For example, using a bank card (something the user has) along with a PIN (something the user knows) provides two-factor authentication.
Using public key cryptography, it is possible to prove possession of a private key without revealing that key. The authentication server encrypts a challenge (typically a random number, or at least data with some random parts) with a public key; the device proves it possesses a copy of the matching private key by providing the decrypted challenge.
Mutual authentication or two-way authentication (not to be confused with two-factor authentication) refers to two parties authenticating each other at the same time in an authentication protocol. It is a default mode of authentication in some protocols ( IKE , SSH ) and optional in others ( TLS ).
Keep your information private and prevent unauthorized access to your account. Safe sign-in methods, up-to-date contact info, and good online habits help keep you secure and safe from scammers. Important: AOL never asks for your password in emails or phone calls. Keep your account safe