Indeed, the old practice of hiding ink in parchment taught us that a message is only as secure as the cover medium, and that the cover must look ordinary to a casual eye. Modern steganography uses the same idea: we embed data in a file that still appears normal to a viewer, whether it’s an image, audio, or video. The ancient wisdom that “the best disguise is the most familiar” still guides how we choose the carrier and how we spread the hidden bits so that the overall noise stays below human detection. In that sense, the scrolls of the past are still a textbook on the foundations of digital data hiding.