Research On Secure Fingerprint Authentication Based On Distance Projection Coding

Identification and authentication systems based on biometrics have gained more and wider applications because of their conveniences and securities. However, traditional biometric systems are faced with new challenges of stronger security with more and more people are privacy aware, and information confidentiality and integrity are common security necessities for any information systems regardless biometric or non-biometric authentication.Biometric cryptosystems refer to biometric authentication systems that utilize techniques of binding biometrics and information security systems together seamlessly. Biometric cryptosystems can also be viewed as security enhanced traditional biometric systems.In this paper, security metrics of biometric cryptosystems as well as that of traditional biometric systems are investigated. Current realizations of biometric cryptosystems are also investigated and compared.We propose a new primitive fuzzy encryption and specific schemes, with motivation of constructing biometric cryptosystems that ensure privacy of templates even when secret keys extracted from the public helper data are known and the secret keys are retrievable without recovering every exact detail of registered template.We also propose a new biometric template recovering scheme based on the designed Distance Projection Coding suitable for set based biometric template which may also introduce white noise on each element in the set, e.g., minutiae based fingerprint. In a word, we propose a full biometric cryptosystem used as secure authentication system for minutiae based fingerprint by combining the two proposals.