Enhanced image encryption using a hybrid technique based on dna cryptography and arnold cat map

Abstract

In information technology, data security is essential. Information shared online may be read by unreliable individuals, which could be detrimental to the information provider. An information authentication technique is necessary when sending data to other parties. The goal of cryptography data security technology is to render data unintelligible to all. There are numerous algorithms and techniques for data encoding. This paper introduces a hybrid technique for data transmission using Arnold’s Cat Map (ACM) and the DNA string. In the implementation stage, the pixel coordinates of the original image are distorted using ACM, and the keystream is built using a DNA sequence. The shuffled image and the keystream are subjected to an exclusive OR operation to generate the encrypted image. Combining two separate cryptography techniques results in an encryption mechanism that covertly increases the security of data transferred between parties. The method encodes and decodes digital photos in grayscale and RGB. The results of this investigation demonstrate that it is possible to successfully preserve a picture file. The size of the image affects the encryption and decryption times. The source and encrypted images are distinguished using the histogram. A low PSNR value in an encrypted image indicates high distortion, which is a required characteristic from a security perspective in the context of image encryption.