What is the process of hiding a message in a medium such as a digital image, audio file, or other file? Cryptography What is the process of hiding a message in a medium such as a digital image, audio file, or other file? a. Multi-Alphabet Substitution b. Transportation Ciphers c. Substitution Ciphers d. Steganography Answer: d. Steganography Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+