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A novel image encryption scheme based on substitution-permutation network and chaos

机译：基于置换置换网络和混沌的图像加密新方案

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摘要

In this paper, a novel image encryption approach based on permutation-substitution (SP) network and chaotic systems is proposed. It consists of four cryptographic phases: diffusion, substitution, diffusion and permutation. Firstly, a diffusion phase is proposed based on new chaotic map. Then, a substitution phase based on strong S-boxes followed by a diffusion phase based on chaotic logistic map are presented which will, in turn, significantly increase the encryption performance. Finally, a block permutation phase is accomplished by a permutation function to enhance the statistical performance of the proposed encryption approach. Conducted experiments based on various types of differential and statistical analyses show that the proposed encryption approach has high security, sensitivity and speed compared to previous approaches.
机译：本文提出了一种基于置换替换（SP）网络和混沌系统的图像加密方法。它包括四个加密阶段：扩散，替换，扩散和置换。首先，基于新的混沌图提出了扩散阶段。然后，提出了基于强S盒的替换阶段，然后是基于混沌逻辑映射的扩散阶段，这将反过来显着提高加密性能。最后，通过置换函数来完成块置换阶段，以增强所提出的加密方法的统计性能。根据各种差异和统计分析进行的实验表明，与以前的方法相比，该加密方法具有较高的安全性，敏感性和速度。

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