A Fast Compressive Sensing Based Digital Image Encryption Technique using Structurally Random Matrices and Arnold Transform

TL;DR

This paper introduces a rapid digital image encryption method combining compressed sensing with structurally random matrices and Arnold transform, enhancing security, speed, and image quality while reducing data size.

Contribution

It presents a novel encryption technique that integrates fast compressed sensing, Arnold transform, and double random phase encoding for improved image security and efficiency.

Findings

Reduces image dimension by 25% with high quality

Demonstrates robustness and security through experimental results

Achieves faster encryption and decryption processes

Abstract

A new digital image encryption method based on fast compressed sensing approach using structurally random matrices and Arnold transform is proposed. Considering the natural images to be compressed in any domain, the fast compressed sensing based approach saves computational time, increases the quality of the image and reduces the dimension of the digital image by choosing even 25 % of the measurements. First, dimension reduction is utilized to compress the digital image with scrambling effect. Second, Arnold transformation is used to give the reduced digital image into more complex form. Then, the complex image is again encrypted by double random phase encoding process embedded with a host image; two random keys with fractional Fourier transform are been used as a secret keys. At the receiver, the decryption process is recovered by using TwIST algorithm. Experimental results including peak-to-peak signal-to-noise ratio between the original and reconstructed image are shown to analyze the validity of this technique and demonstrated our proposed method to be secure, fast, complex and robust.