Pixels with Secrets: Understanding the Art and Science of Hidden Data in Digital Media
A photograph of a sunset, a podcast audio file, a PDF attachment in an email—any of these could contain information that is entirely invisible to the naked eye yet fully recoverable by those who know where to look. Steganography, the ancient practice of concealing messages within ordinary objects, has found a powerful new medium in the digital age, and its implications stretch from corporate security to underground communication networks.