Image encryption algorithm based on scrambling switching decision mechanism harmony search
CHEN Yu-xin
Abstract：In order to solve the low security problem caused by the fact that it is difficult to reduce effectively the closeness between adjacent pixels because of the periodicity in the scrambling process for the current image encryption algorithms, an image encryption algorithm based on scrambling switching decision mechanism coupling with dynamic harmony search was proposed.The plain text was divided into equal image sub-blocks, and a random array group was obtained through Logistic mapping.In addition, the scrambling switching decision mechanism was defined, and the sub-blocks were permutated through selecting the appropriate scrambling function according to the switching parameters.The closeness between the image entropy and adjacent pixels was taken as the objective function, and was used to replace the traditional harmony search model.Through improving the optimal secret key exported by the harmony search mechanism and performing the repeated searching and optimization, the smallest closeness between adjacent pixels was obtained.The results show that compared with the current image encryption techniques, the proposed algorithm has higher security as well as better shear and differential attack resistances.
Keywords：image encryptionscrambling switching decision mechanismharmony search algorithmswitching parameterZigzag scanningpixel encryption functionLogistic mappingencryption function
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 333-339 )