The single most effective defense. Even if a password is leaked, the attacker cannot gain access without the second factor.
Encourages users to use unique, complex passwords for every site, rendering "combo lists" useless for cross-platform attacks. 1 Million UHQ USA Combos (3).txt
Fraudulent purchases and drained bank accounts. The single most effective defense
Prevents automated tools from attempting thousands of logins in seconds. complex passwords for every site