What are the best multi-factor authentication solutions for protecting your professional accounts?

1 SMS Codes

Text messages with one-time codes are a widely adopted form of MFA. When you attempt to log in, a unique code is sent to your mobile device, which you must enter to proceed. This method leverages something you have—your phone—as an authentication factor. While convenient, it's important to be aware that SMS codes can be intercepted by determined attackers, so it's not the most secure option available. Nonetheless, it offers a significant security upgrade over simple username and password combinations.

2 Authenticator Apps

Authenticator apps generate time-based, one-time passwords (TOTPs) on your mobile device. These apps provide a more secure alternative to SMS codes because they don't rely on potentially interceptable communication channels. After initial setup, the app will produce a new code every 30 seconds or so, which you use during the login process. This method strikes a balance between security and usability, making it a popular choice among professionals.

3 Biometric Verification

Biometric verification uses unique physical characteristics, such as fingerprints or facial recognition, as an authentication factor. This method is highly secure because it's based on something you are, making it extremely difficult for someone else to replicate. Biometric systems can be costly and complex to implement, but for businesses handling highly sensitive information, the investment in such technology can be justified by the enhanced security it provides.

4 Hardware Tokens

Hardware tokens are physical devices that generate a login code at the push of a button or when plugged into a computer's USB port. They are considered one of the most secure MFA methods because they require physical possession of the token. This makes remote attacks nearly impossible. However, they can be inconvenient if lost or forgotten, and the cost of distribution can be high for larger organizations.

5 Push Notifications

Push notifications involve a prompt sent to a pre-authorized device, usually a smartphone, asking you to approve or deny access attempts. This method is user-friendly and more secure than SMS codes because it involves a device you have explicitly trusted. Push notifications also offer the advantage of alerting you to unauthorized login attempts in real time.

6 Software Certificates

Software certificates involve installing a digital certificate on your device that servers can use to verify your identity. This method is particularly useful for organizations that want to ensure devices accessing their networks are pre-approved. The certificates act as a strong form of MFA because they're difficult for attackers to forge and don't require user interaction during the login process.