IMAGE ENCRYPTION TECHNIQUE BASED ON BINARY COMBINATION OF MULTIPLE CHAOTIC MAPS AND DNA SEQUENCE OPERATIONS

(Received: 11-May-2024, Revised: 17-Jul.-2024 , Accepted: 30-Jul.-2024)

Authors Nisreen I. R. Yassin,

Keywords #Information security #Cryptography #Chaotic maps #Image encryption #DNA

Abstract The huge advance of digital communication and networks has led to enormous storage and transmission of information over public networks. Nevertheless, the assurance of information security remains incomplete across these unsecured networks. Currently, digital images are the primary mean for sharing information over open networks. Consequently, the confidentiality of digital images during storage and transmission has become a crucial concern, particularly when sharing sensitive information. Image encryption has emerged as a solution to this problem. This paper presents an image encryption technique based on multiple one-dimensional chaotic maps and DNA coding. The technique employs three one-dimensional chaotic maps, including the logistic map, tent map and piecewise map, multiple times to produce 18 random sequences with different initial values and parameters. SHA-512 hash function is used to indicate the initial values of chaotic maps. For encrypting images, the binary elements from various sequences of chaotic maps are amalgamating to alter the pixel intensities of the image in the diffusion process. Dynamic DNA coding is performed through random selection of DNA rules and operations (XOR, XNOR and Addition) to each pixel in the image. The technique is enforced using circular rotations which are applied randomly to each key. The proposed technique is evaluated using many standard images. Different performance metrics have been measured. The empirical findings illustrate the security and resilience of the suggested method and its ability to resist statistical and differential attacks.

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