Biometric Cryptosystem with Renewable Templates

The major challenge of privacy protection of biometric template is improve the security of the biometric template. Biometric cryptosystems were proposed to hide the cryptographic keys as well as provide security protection of biometrics associated with the traditional biometric systems. A fuzzy commitment scheme is an example of such systems. Moreover, the biometric data cannot be canceled or changed, once the biometric template is compromised. Then, all applications depending on this user's biometric data are compromised forever. Thus, it is desirable to have schemes that protect the biometric template as well as generate a new unique pattern if the one being used is lost to be adopted in practical biometric applications. In this paper, we integrate the fuzzy commitment approach with biometrics to achieve a new and simpler type of cancelable biometric scheme in which the template is privacy protected, and multiple fuzzy commitments of the templates can be derived from the same biometric template for the purpose of template renewability.