Two-factor Authentication (2FA)

Two-factor authentication (2FA) is a security method that requires two separate forms of verification before granting access to an account: something you know (your password) and something you have (a code from an app, SMS, or hardware key). It dramatically reduces the risk of account compromise — even if an attacker has your password, they can't log in without the second factor.

What it means

Password-only authentication is the most common and least secure form of login. Data breaches, phishing attacks, and credential-stuffing (using leaked passwords from one breach to try to access other accounts) are pervasive. 2FA doesn't eliminate these threats, but it raises the cost of a successful attack significantly: the attacker needs both your password and access to your phone or hardware key at the same time.

The most secure form of 2FA uses a hardware security key (like a YubiKey) or an authenticator app (Google Authenticator, Authy, Aegis). SMS-based 2FA, while better than nothing, is vulnerable to SIM-swapping attacks where an attacker socially engineers your mobile carrier to redirect your number to their device.

How it works on Gab

Gab supports two-factor authentication for account security. For an account under attack — whether from political adversaries trying to compromise and then report it, or from more ordinary phishing — 2FA is a baseline protection. Enable it in your Gab account security settings. Use an authenticator app rather than SMS if possible.

Related terms

2FA is part of the account security stack alongside strong passwords and pseudonymity. Doxxing and account compromise are the threats it helps defend against. End-to-end encryption protects message content; 2FA protects account access.