The best replacement for biometrics is passwords.

The best alternatives to biometrics are rated as following:
★★★★★  passwords
★★★  biometric
★★  smart cards
★  fingerprint

Your alternative for biometrics is not listed? Suggest!
Speaking about biometrics, one probably shouldn't forget about payroll system.

Other search terms related to biometrics and their ratings are:
★★★★★ payroll system
★★ rfid
★ cryptography
You have in mind a companion for biometrics and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of biometrics in all years. Click on graph for more.
biometrics
passwords
biometric