A robust chaos-based image encryption scheme

Authors:
Weihai Li;Nenghai Yu
Affiliations:
Microsoft Key Laboratory of Multimedia Computing and Communication, University of Science and Technology of China, MOE, Hefei, China;Microsoft Key Laboratory of Multimedia Computing and Communication, University of Science and Technology of China, MOE, Hefei, China
Venue:
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
Year:
2009

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Abstract

A DCT domain image encryption scheme based on chaotic shuffling table is proposed, in which the shuffling tables are generated by several Logistic maps. This scheme is robust to normal image processing, such as noising, smoothing, compressing, and even print-scan processing. In this scheme, key space is easy to be adjusted by choosing the number of Logistic maps. The encrypted image is still highly compressible since shuffling operation is confined in DCT equal-frequency coefficients. What is more, a random number, called nonce, is introduced to initialize initial values of Logistic maps, which ensures that the proposed scheme can resist chosen-plain-text cryptanalysis.