Diffusion-Based Hierarchical Image Steganography
This addresses the need for improved content safeguarding and privacy fortification in image steganography, representing a novel method rather than an incremental improvement.
The paper tackles the problem of securely embedding multiple images into a single container by introducing Hierarchical Image Steganography, which uses diffusion models to assign varying robustness levels and achieves enhanced security and capacity, as demonstrated through rigorous evaluations.
This paper introduces Hierarchical Image Steganography, a novel method that enhances the security and capacity of embedding multiple images into a single container using diffusion models. HIS assigns varying levels of robustness to images based on their importance, ensuring enhanced protection against manipulation. It adaptively exploits the robustness of the Diffusion Model alongside the reversibility of the Flow Model. The integration of Embed-Flow and Enhance-Flow improves embedding efficiency and image recovery quality, respectively, setting HIS apart from conventional multi-image steganography techniques. This innovative structure can autonomously generate a container image, thereby securely and efficiently concealing multiple images and text. Rigorous subjective and objective evaluations underscore our advantage in analytical resistance, robustness, and capacity, illustrating its expansive applicability in content safeguarding and privacy fortification.