An Optimized Image Encryption Scheme, Leveraging the Arnold Transform and Chaotic Map

Abstract

The traditional approach to image encryption faces significant challenges and issues, including inadequate
safety, image degradation, low latency, low-key sensitivity, diffusion, and strong correlation. To address these
shortcomings, a new image encryption algorithm is proposed in this work. The algorithm uses a combination of
Discrete Cosine Transform (DCT) and Arnold transform along with chaotic scrambling to enhance the image
security. The two-level encryption approach performs transformations in the position of each pixel without
changing their values or statistical features. The proposed algorithm is evaluated and shown to offer several
advantages, including robust performance, statistical efficacy, high key sensitivity, picture security, and real-time
performance. Overall, the proposed algorithm represents a significant improvement over the traditional approach
to image encryption.