Abstract
This paper presents two chaotic image encryption plans combined with Discrete Wavelet Transform (DWT) to encrypt unique fingerprint. In the first proposal, the fingerprint which has few details (low entropy) is fused with another image which is rich in details (high entropy) using the Discrete Wavelet Transform (DWT) prior to encryption. The fusion process is a pre-processing step to alter the homogeneity of flat areas in the few-details fingerprint image. Then, the technique of the Chaotic Baker map randomization is applied on the output fused image. In the second proposal, the fingerprint is fused with an image encrypted with RC6 block cipher algorithm prior to encryption. Several metrics are used in this paper for performance evaluation of the proposed encryption scheme including, visual inspection, histogram analysis, encryption quality analysis, and diffusion analysis. The outcomes demonstrate that the proposed image encryption schemes give a proficient and secure path for unique fingerprint encryption.
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