A Fast Image Encryption Scheme for Diverge Applications Using Chaotic Index Swapping Confusion-Diffusion

The increase in communication networks has resulted in a rise in the transmission of multimedia data via unsecured channels. Multimedia images must be protected while being transmitted through unsecured communication channels. This paper proposes a method for rapid encryption of images that employ maps based on chaos and confusion and diffusion operations based on chaotic index swapping. The process involves generating the bit-planes for each colour component and then horizontally concatenating the bit-planes of each component separately. The concatenated outputs undergo a columnar shuffling operation followed by a row shuffling operation, utilising the chaotic map-generated indexing sequences. The shuffling operation based on indexes involves the swapping of indexes, which enhances the confusion of the algorithm and provides increased security. The process culminates in the production of ciphertext, which is achieved through the diffusion of shuffled outputs by individual key images generated by chaotic maps. The suggested scheme has been assessed through computer simulations and security analysis and has been found to be capable of securely and efficiently encrypting images.