Innovative Image Encoding Based on Five- and Six-Dimensional Chaotic Dynamics

The protection of digital images is intended to prevent unauthorised access to visual content when it is transmitted over the internet and other networks using encryption technology; This research presents a method for encrypting colour images using a five- and six-dimensional hyper-chaotic system, in which an encryption key required for the encryption stages is generated via hyper-chaotic dynamics. Several sequential chaotic keys were utilised by creating and encrypting an image of a size proportional to the original image, after which the randomly arranged, and random algorithms are subsequently employed to XOR the source image. Thereafter, rules are applied to the rows following a cyclic pattern dictated by the hyper-chaotic keys, whilst the columns are rotated analogously, as directed by the hyper-chaotic keys. Finally, the changes are distributed across all pixel values , with the encryption process concluding at a stage utilising XOR transformations using the final random key, K₄. This approach establishes robust performance and security through experimental research, with an average NBCR of 98.5 per cent, a key size of 2,884, and an average UCL of 34.2 The information entropy reached a very close-to-ideal value of approximately 8.