Lossless and Content-Based Hidden Transmission for Biometric Verificaion

This paper presents a novel lossless and content-based hidden transmission method of biometric images to improve the security and secrecy of biometric verification. Chaos is used to encrypt the watermark. The secret keys which called biokey are generated from the biometric image and used as the parameter value and initial condition of the chaotic map. The digital watermark embedded losslessly in the region of interest (ROI) of palmprint is used to recognize the palmprint has been destroyed or not and regarded as a user information index for verification. The watermarked ROI is hidden in the general public image using content-based steganography technology and transmitted secretly in case of attracting the attackerspsila attention. Our method can overcome the disadvantage of block-based steganographic techniques. Experimental results show that the security and performance of the proposed scheme are high.