Enhanced image encryption using chaotic maps and elliptic curve cryptography with elliptic curve Diffie–Hellman key exchange

This study presents a revolutionary method for the encryption of images, which combined the advantages of chaotic maps and elliptic curve cryptography and thus so created a more secure algorithm. The new technique consists of first scrambling the image with two-dimensional Henon chaotic maps and logistic–Gompertz maps for both confusing and diffusing processes. Later, the image that has been scrambled is secured using the systematic layer of Elliptic Curve Cryptography (ECC) by applying the Elliptic Curve Diffie–Hellman (ECDH) key agreement method. The ECDH makes it possible to derive a shared session key, which is then used in an improved ElGamal encoding scheme for secure image transmission. This plan is motivated by the desire to reconcile the high-tech characteristics of elliptic curve methods for increasing the overall security of image encryption with the chaotic techniques for effective initial scrambling. The application of this proposed technique is very important in the case of secure image transmission in areas like military, healthcare and private data exchange, where it is extremely important to ensure the confidentiality and integrity of images.