Journal
MULTIMEDIA TOOLS AND APPLICATIONS
Volume 76, Issue 1, Pages 1217-1246Publisher
SPRINGER
DOI: 10.1007/s11042-015-3027-1
Keywords
Orthogonal polynomials transform (OPT); Zero-cross edge detection; Chaos; Region of interest (ROI); Selective encryption; Smart-phone security; Square-wave shuffling
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In this paper, a selective image encryption algorithm based on square-wave shuffling in the orthogonal polynomials domain is proposed. This algorithm is adaptive to the user device's computing power, as it can operate in the spatial/frequency/hybrid domain. Simultaneous confusion and diffusion is performed on important regions, while in unimportant regions, shuffling is conducted; chaotic maps are used for both. To obtain the encrypted image, a new shuffling method, called square-wave shuffling, is proposed and applied. Extensive experiments have been conducted in PCs and in smart-phones with the Android programming environment. Its suitability to these devices is verified, and the superiority of the proposed method in comparison to other contemporary methods is also reported.
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