Abstract
Recently, a new image encryption algorithm based on chaos has been proposed [Circular inter-intra pixels bit-level permutation and chaos-based image encryption, Information Sciences, 355-356: 314-327, 2016]. In this paper, this image encryption algorithm was crypt-analyzed in detail. Some defects of it, such as its row-based scrambling being invalid for the special images and the lacking of diffusion operations in its processes, were pointed out. Meanwhile, two crack methods were presented in this paper. They are using only a pair of chosen plain-cipher images or a pair of known plain-cipher images to crack the image encryption algorithm. That is enough to demonstrate the image cryptosystem using this image encryption algorithm is insecure.
Highlights
The image information security is closely related to people’s daily life
With the vigorous development of image crypto-graphy, the cryptanalysis researches on image encryption systems have achieved fruitful results
The work of this paper is aimed at the cryptanalysis of the algorithm in [38]
Summary
In order to realize secure image transmission and storage on the internet and cloud, a large number of image encrypting and hiding systems have been proposed [1]–[8]. With the vigorous development of image crypto-graphy, the cryptanalysis researches on image encryption systems have achieved fruitful results. The image encryption algorithms in [9]–[18] are cracked by the cryptographic analysis methods in [19]–[28], respectively. Among these image cryptanalysis methods, the known/chosen plain-image attacks are the most commonly used methods. Advances in image cryptanalysis technologies are prompting the researchers to continue to study more secure image encryption algorithms
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