Towards protecting biometric templates without sacrificing performance

The ideal biometric template protection scheme possesses the properties of irreversibility, revocability, unlinkability, and good performance. These properties protect the security of the biometrics system as well as users' privacy. Practical systems, however, fall short of this ideal. In this paper, we present a novel protection scheme that achieves this ideal under the circumstance that a subject's token and his biometric template are not concurrently exposed. Moreover, our scheme can add template protection to any face verifier. We do this by rendering virtual faces, rather than by devising new biometric features, which is the more common approach. Experimental evaluations using two public face recognition systems show that accuracy is not adversely affected with our scheme.