Template Security: Symmetric Angle Hash Algorithm

Abstract

The templates are the pivotal element of the biometric system. Once templates are intruded then authenticity of the biometric systems is at stake, as the original biometric can be replaced by the imposter’s template or the original template can be used to access personal information, account details, health records etc or the original template can be spoiled so that the authenticated user of the system does not possess access or the template could be used to do replay attack. An algorithm which works progressively without decreasing the performance of system for fingerprint biometric templates and help in escalating the issues of templates theft is proposed and named Symmetric angle hash algorithm which is robust enough to secure the fingerprints and help in verifying the fingerprint scans. The preliminary approach involves extracting minutiae’s, global features and angle computations from the fingerprint and storing them.Followed with the comparisons on distance metrics and consequently give authentication and verification. The testing is done on a standard database FVC 2002. The experimental results predict this algorithm is suitable for securing templates with effective trade-off between FAR and FRR values.