Which description best fits steganography?

• A. Encrypting data to conceal it
• B. Replacing sensitive data with non-sensitive tokens
• C. Hiding data within another medium
• D. Generating random keys for each session

Answer: (C)

Steganography is about hiding a secret message inside something ordinary so that the message’s existence isn’t obvious. The best description is hiding data within another medium, such as embedding information in the pixels of an image or in audio/video files, so observers see only the cover medium and not the hidden content. This differs from encryption, which hides the content but not the fact that a message exists. Tokenization replaces sensitive data with non-sensitive tokens for processing, but it isn’t about concealing the message inside another medium. Generating random keys for each session is about creating secure keys, not hiding information. So hiding data within another medium captures the essence of steganography.