Two-Factor Authentication (2FA)
Also known as: 2FA, Multi-Factor Authentication, Two-Step Verification
A security method requiring two forms of verification before granting access to an account or system.
Two-Factor Authentication (2FA) is a security enhancement that requires users to present two separate forms of verification to access an account. Typically, this involves something the user knows (like a password) and something the user has (like a smartphone or security key). In crypto, 2FA is crucial for securing exchange accounts, wallets, and dApps. Popular implementations include time-based one-time passwords (TOTP) via apps like Google Authenticator or hardware keys like YubiKey. While not blockchain-native, 2FA is vital for safeguarding digital assets in Web2-to-Web3 interfaces.