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

Entropy

Xing-Yuan Wang¹  Ying-Qian Zhang¹  Xue-Mei Bao¹  Guanrong Chen²  C.K. Michael Tse²  Mustak E. Yalcin²  Hai Yu² 

[1] Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China; E-Mail:;Faculty of Electronic Information and Electrical Engineering, Dalian University of Technology, Dalian 116024, China; E-Mail

关键词: image encryption;    spatiotemporal chaos;    colour image;    permutation;    substitution;   

DOI  :  10.3390/e17063877

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland