Learn about steganography - the cryptographic technique of concealing messages within digital files - in this 40-minute technical video. Explore the ancient art of information hiding that dates back to 500 BC, from historical examples like Histiaeus's tattooed message on a slave's head to modern digital implementations. Master practical techniques for embedding files, messages, images or videos within other digital assets using Python and computer vision. Follow along with hands-on examples using the provided Jupyter notebook to understand how steganography leverages image processing to securely hide data from unwanted eyes. Discover the Greek etymology of "steganos" (hidden) and "graphe" (writing) while learning both the theoretical foundations and practical applications of this fascinating field at the intersection of cryptography and computer vision.