Toward Resisting Black-Box Attacks: A Robust Coverless Image Steganography Based on Hierarchical CID and Dual SIFT

This research paper presents a new method for coverless image steganography (CIS, a technique to hide secret information inside images without visibly altering them), designed to resist black-box attacks (attacks where an attacker can't see how the system works, only its outputs). The method uses SIFT (Scale-Invariant Feature Transform, an algorithm that identifies distinctive points in images), to create a dataset and mapping structure that hides data more securely and with greater capacity than previous CIS methods.