Triple-image encryption scheme based on one-time key stream generated by chaos and plain images

Authors:
Hongjun Liu;Xingyuan Wang
Affiliations:
Department of Electronic and Information Engineering, Dalian University of Technology, Dalian 116024, China and Department of Information Engineering, Weifang Vocational College, Weifang 261041, C ...;Department of Electronic and Information Engineering, Dalian University of Technology, Dalian 116024, China
Venue:
Journal of Systems and Software
Year:
2013

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Abstract

A triple color image encryption scheme based on chaos is designed. After decomposing the red, green and blue components of the three color images into three grayscale images, recombine them into one color image, then bitwise circularly shift each color pixel for randomly finite number of times. Finally, encrypt the shifted image by three pseudo-random sequences generated by the chaos with dynamical initial conditions, which are generated by the 256-bit long hash value that dependent on the three plain images. Numerical simulation has been performed to test the validity of the scheme, it's suitable for encrypting images in batches.