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Template protection based on DNA coding for multimodal biometric recognition

Biometrics authentication based on multimodal fusion can overcome the problems of the existence of unimodal biometric to a large extent. However, multimodal biometric template once leaked, it will bring more harm, so it is necessary to study the template protection algorithm for multimodal biometric. This paper proposes a novel multimodal biometric template protection algorithm based on DNA encoding. First, the biometric features of the multimodal template are convert into a DNA sequence by DNA encoding, and a chaotic sequence is generated and convert into a DNA sequence, then the two DNA sequences are performed by the DNA adding operation, and the sum is convert into decimal numbers, so we get the encrypted template. The results of our experiment show that the proposed multimodal biometric template protection scheme does not affect the recognition performance and ensure the security of multimodal biometric template.