Approach to cryptographic key generation from fingerprint biometrics
Subhas Barman, Debasis Samanta, Samiran Chattopadhyay · International Journal of Biometrics · 2015
In crypto-biometric system (CBS), biometric is combined with cryptography. In CBS, either accessing a cryptographic key is controlled with biometric or the key is generated from biometric features. This work is related to the latter approach in CBS. In such a system, protecting the privacy of the biometric data is an important concern. Further, there is a need to generate different cryptographic keys from the same biometric template of a user. Cancellable transformation of biometric data prior to the key generation is known as a solution. In this paper, we propose an approach to generate cryptographic key from cancellable fingerprint templates (CT) of sender and receiver to ensure the privacy of the fingerprints and at the same time, it produces revocable key for the application of symmetric cryptography. The between-person variability of CTs guarantees the randomness which ensures that impostor users are not able to generate a genuine CT to break the cryptographic key.