BIOMETRIC TEMPLATE PROTECTION: TOWARDS A SECURE BIOMETRIC SYSTEM

Biometric template security is one of the most important issues in developing a practical biometric system. In this chapter, we discuss the threats to biometric authentication systems and give a review on existing approaches for protecting biometric templates. The schemes are classified into three categories, namely biometric cryptosystem approach, transform-based approach and the hybrid approach. Pros and cons of each approach are also discussed.