Research on Digital Image Encryption Based on Squirrel Search Algorithm Optimised Logistic-Ushiki Chaotic Fusion
Aiming at the shortcomings of Logistic chaotic image encryption,such as simple structure,few parameters and small key space,we propose Logistic-Ushiki chaotic encryption based on squirrel search algorithm.Firstly,the chaotic mapping model Logistic-Ushiki with Logistic and Ushiki fusion is proposed,secondly,for the problem of lack of optimality of chaotic parameters,we optimize the algorithm in terms of the optimization of predator probability and the screening of individuals,and finally,the improved squirrel search algorithm will be optimized to the Logistic-Ushik parameters,and we describe the model for image encryption process.In the simulation experiments,the algorithm of this paper obviously outperforms the performance of the comparison algorithm in terms of statistical analysis,correlation of neighbouring elements,information entropy and resistance to attacks,and the results show that the algorithm has better effect and security in image encryption.
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