More companies are ditching passwords and using fingerprints and other biometrics to stop hackers.

"We're seeing a very rapid evolution from what used to be passwords, then smart cards, and now to biometrics," said Alex Simons, director of program management in Microsoft's identity division.

Biometric authentication uses face, fingerprint or iris scans to quickly confirm a person's identity. You probably already use it by touching the home button to unlock your phone.