A Chaos-based Image Encryption Scheme using Chaotic Coupled Map Lattices

TL;DR

This paper proposes a chaos-based image encryption scheme utilizing coupled map lattices to enhance security and robustness, addressing issues like small key space and vulnerability to attacks.

Contribution

It introduces a novel encryption scheme based on coupled map lattices that reduces periodic effects and improves security compared to existing chaos-based methods.

Findings

Large key space demonstrated

Low correlation between adjacent pixels

Resistant to differential attacks

Abstract

In recent years, information security essential in various arenas like internet communication, multimedia systems, medical imaging, tele-medicine and military communication. However, most of them faced with some problems such as the lack of robustness and security. In this letter, after reviewing the main points of the chaotic trigonometric maps and the coupled map lattices, we introduce the scheme of chaos-based image encryption based on coupled map lat tices. The scheme decreases periodic effect of the ergodic dynamical systems in the chaos-based image encryption. To evaluate the security of the encrypted 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.