Biometric cryptosystem (BC) is a very secure approach for template protection because the stored template is encrypted. The key issues in BC approach include (i) limited capability in handling intra-class variations and (ii) binary input is required. To overcome these problems, this paper adopts the concept of discriminative analysis and develops a new binary discriminant analysis (BDA) method to convert a real-valued template to a binary template. Experimental results on CMU-PIE and FRGC face

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... atabases show that the proposed BDA method outperforms existing template binarization schemes.