MFA is the single most effective defense against leaked credentials. Even if someone has your email and password from a list, they cannot log in without the second factor (such as an authenticator app code or a physical security key). If you are an ethical hacker or security researcher:
: Use leaked data (in a controlled, legal environment) to identify patterns in password creation and help organizations force password resets for compromised users. 66k Mail Access Combolist.txt
: Tools like Bitwarden, 1Password, or Dashlane can generate and store complex, unique passwords for every service you use. MFA is the single most effective defense against