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Entropy 2015, 17(6), 3877-3897;

A Colour Image Encryption Scheme Using Permutation-Substitution Based on Chaos

Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China
City Institute, Dalian University of Technology, Dalian 116600, China
Authors to whom correspondence should be addressed.
Academic Editors: Guanrong Chen, C.K. Michael Tse, Mustak E. Yalcin, Hai Yu and Mattia Frasca
Received: 9 February 2015 / Revised: 1 April 2015 / Accepted: 8 April 2015 / Published: 9 June 2015
(This article belongs to the Special Issue Recent Advances in Chaos Theory and Complex Networks)
Full-Text   |   PDF [5792 KB, uploaded 9 June 2015]


An encryption scheme for colour images using a spatiotemporal chaotic system is proposed. Initially, we use the R, G and B components of a colour plain-image to form a matrix. Then the matrix is permutated by using zigzag path scrambling. The resultant matrix is then passed through a substitution process. Finally, the ciphered colour image is obtained from the confused matrix. Theoretical analysis and experimental results indicate that the proposed scheme is both secure and practical, which make it suitable for encrypting colour images of any size. View Full-Text
Keywords: image encryption; spatiotemporal chaos; colour image; permutation; substitution image encryption; spatiotemporal chaos; colour image; permutation; substitution
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Wang, X.-Y.; Zhang, Y.-Q.; Bao, X.-M. A Colour Image Encryption Scheme Using Permutation-Substitution Based on Chaos. Entropy 2015, 17, 3877-3897.

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