If you can only implement one security control, make it MFA. Here is why multi-factor authentication stops most account takeover attempts.
Passwords Alone Are Not Enough
Passwords are stolen, guessed, reused, and leaked every day. Even strong passwords can be compromised through phishing, credential stuffing, or data breaches. Multi-factor authentication adds a second step to the login process, making stolen passwords far less useful to attackers.
How MFA Stops Common Attacks
Most account takeover attacks fail when MFA is enabled. Even if an attacker has the correct password, they cannot access the account without the second factor — typically a code from an authenticator app, a hardware key, or a biometric prompt. This single control blocks the majority of phishing and brute-force attempts.
Where to Enable MFA First
Start with the highest-risk accounts: email administrators, Microsoft 365 or Google Workspace admins, financial systems, cloud storage, VPN access, and any account with access to customer or financial data. Then expand coverage to every user in the organization.
Avoid Weak MFA Methods
SMS-based MFA is better than nothing, but it is vulnerable to SIM swapping and interception. Authenticator apps and hardware security keys are stronger options. Choose methods appropriate for your risk level and make MFA mandatory rather than optional.