A New Chaos-Based Cryptosystem for Secure Transmitted Images

TL;DR

This paper introduces a new chaos-based cryptosystem for secure image transmission that employs 2D chaotic maps for pixel shuffling and multiple rounds of confusion and diffusion, demonstrating high security and robustness over noisy channels.

Contribution

The paper proposes a novel chaos-based cryptosystem with a unique perturbing orbit technique and multiple encryption rounds, enhancing security and error resilience in image transmission.

Findings

High security level confirmed by extensive tests

Robustness demonstrated over corrupted digital channels

Effective image encryption with improved statistical properties

Abstract

This paper presents a novel and robust chaos-based cryptosystem for secure transmitted images and four other versions. In the proposed block encryption/decryption algorithm, a 2D chaotic map is used to shuffle the image pixel positions. Then, substitution (confusion) and permutation (diffusion) operations on every block, with multiple rounds, are combined using two perturbed chaotic PWLCM maps. The perturbing orbit technique improves the statistical properties of encrypted images. The obtained error propagation in various standard cipher block modes demonstrates that the proposed cryptosystem is suitable to transmit cipher data over a corrupted digital channel. Finally, to quantify the security level of the proposed cryptosystem, many tests are performed and experimental results show that the suggested cryptosystem has a high security level.