A Simple and Effective Two-Factor Protection Scheme for MCC Fingerprint Templates

Minutia Cylinder-Code (MCC) is an effective representation for robust and fast fingerprint matching. To avoid that MCC templates can disclose sensitive information about position and angle of minutiae, a protected MCC representation was recently introduced (called P-MCC). In spite of a satisfactory level of accuracy and irreversibility, P-MCC templates cannot be revoked. In this paper we propose a two-factor protection scheme that makes P-MCC templates revocable. As for many two-factor schemes, the use of a second factor (i.e., a secret key) increases accuracy; however, differently from many other existing approaches, the novel method here proposed guarantees good security even if the key is compromised (token-stolen scenario).