Integrate encryption of multiple images based on a new hyperchaotic system and Baker map

Abstract

Image encryption serves as a crucial means to safeguard information against unauthorized access during both transmission and storage phases. This paper introduces an integrated encryption algorithm tailored for multiple images, leveraging a novel hyperchaotic system and the Baker map to augment the key space and enhance security measures. The methodology encompasses a permutation-diffusion framework, employing sequences derived from the hyperchaotic system for both permutation and diffusion operations. Initially, the multiple images undergo intermixing, consolidating them into a singular image. Subsequently, the Baker map is employed to further scramble this amalgamated image, thereby extending the scrambling period. Ultimately, the ciphertext image is generated through forward–backward diffusion applied to the pixel sequence of the Zigzag scanned image. Experimental findings substantiate the high-security efficacy of the proposed scheme, demonstrating resilience against diverse threats.