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Cryptanalysis of an Image Scrambling Scheme Without Bandwidth Expansion

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4 Author(s)
Shujun Li ; FernUniversitat in Hagen, Hagen ; Chengqing Li ; Kwok-Tung Lo ; Guanrong Chen

Recently, a new image scrambling (i.e., encryption) scheme without bandwidth expansion was proposed based on two-dimensional discrete prolate spheroidal sequences. A comprehensive cryptanalysis is given here on this image scrambling scheme, showing that it is not sufficiently secure against various cryptographical attacks including ciphertext-only attack, known/chosen-plaintext attack, and chosen-ciphertext attack. Detailed cryptanalytic results suggest that the image scrambling scheme can only be used to realize perceptual encryption but not to provide content protection for digital images.

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Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:18 ,  Issue: 3 )