Image Encryption Based on Hybrid Parallel Algorithm: DES-Present Using 2D-Chaotic System

Abstract

Image encryption algorithms have recently been developed to protect data from hackers and give recipients privacy. DES is a widely recognized block cypher that has certain vulnerabilities that make it susceptible to differential attacks. The present is a lightweight symmetric algorithm that provides privacy for transferring information over the network but has some drawbacks in that it is difficult to maintain an appropriate level of complexity. The study suggests that to encrypt and decrypt images as quickly as possible, the system uses parallel environments in algorithms (Present and DES). It also uses a 2D-Chaotic key generation system to make the system stronger against statistical, differential, and brute force attacks. Where the DES algorithm uses four rounds, within each one round from the des, the present algorithm executes only four rounds, and the same 2D-Chaotic System is used to generate the key. The keys and blocks are distributed to 4 cores, 5 cores, or 6 cores at the same time. The performance evaluation of the proposed algorithm is quantified by several metrics: All peak signal-to-noise ratio (PSNR) values are low, which means the quality image encryption is good. Unlike MSE, all the values are very high, which indicates that the image we have encrypted has no similarity to the encrypted image. The NPCR value of 99.6658% indicates a high degree of accuracy in changing pixel values. Additionally, a unified average changing intensity (UACI) that doesn't go over 30.90% shows that the algorithm is good at making big changes in pixel intensities. And the analysis speed of the proposed system based on the parallelism of the environment is faster than the sequence algorithms (DES-Present). The results demonstrate the algorithm's ability to encrypt color images, making it useful in applications that require strong data and image security.