A Novel Chaotic Image Encryption using Generalized Threshold Function

TL;DR

This paper proposes a new chaotic image encryption method utilizing a generalized threshold function to enhance security and randomness, addressing issues like small key space and vulnerability to attacks.

Contribution

It introduces a novel generalized threshold function-based chaotic encryption scheme that reduces periodic effects and improves security over existing methods.

Findings

Enhanced randomness due to generalized threshold function

Increased key space and security against differential attacks

Reduced periodic effects in chaotic encryption

Abstract

In this paper, after reviewing the main points of image encryption and threshold function, we introduce the methods of chaotic image encryption based on pseudorandom bit padding that the bits be generated by the novel generalized threshold function (segmentation and self-similarity) methods. These methods decrease periodic effect of the ergodic dynamical systems in randomness of the chaotic image encryption. The essential idea of this paper is that given threshold functions of the ergodic dynamical systems. To evaluate the security of the cipher image of this scheme, the key space analysis, the correlation of two adjacent pixels and differential attack were performed. This scheme tries to improve the problem of failure of encryption such as small key space and level of security.