steganography
/ˌstɛɡəˈnɑɡrəfi/
noun
- The practice of hiding a secret message inside another, non-secret message, image, or file.
- Modern steganography often involves hiding text within the pixels of an image.
- The spy used steganography to hide the code inside a digital photograph.
- She learned about steganography in her cybersecurity class and tried hiding a message in a music file.