WSEAS Transactions on Signal Processing
Print ISSN: 1790-5052, E-ISSN: 2224-3488
Volume 11, 2015
Image Cryptosystem Based on Digital Signature and Double Random Phase Encoding
Authors: , , ,
Abstract: This paper presents a new technique of multi-level security for image transmission based on image signature by Discrete Cosine Transform (DCT2) and image encryption by Double Random Phase Encoding (DRPE). This technique is implemented in two successive steps to enhance the security level of the transmitted image. The proposed technique exploits the benefits of signature and encryption, which make it robust to image processing attacks such as speckle, impulsive and Gaussian noise. Several experiments have been carried out to test the performance of the proposed technique in the terms of Peak Signal-to-Noise Ratio (PSNR), processing time and correlation coefficients. The obtained results show that, the proposed technique enhances the security level of the transmitted images with better immunity to noise when compared to stand-alone signature or DRPE.
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Keywords: Digital image signature, Discrete Cosine Transform (DCT), Image encryption, Double Random Phase Encoding (DRPE)
Pages: 245-254
WSEAS Transactions on Signal Processing, ISSN / E-ISSN: 1790-5052 / 2224-3488, Volume 11, 2015, Art. #29