Steganography is a technique of hiding a secret message within an ordinary message and extracting it at the destination to maintain the confidentiality of data.

• A. False
• B. It hides data using encryption only
• C. True
• D. It is only theoretical

Answer: (C)

Steganography hides a secret message inside an ordinary carrier so that the hidden content remains invisible to casual observers. The statement captures this idea by describing hiding a secret message within an ordinary message and then extracting it at the destination to keep the data confidential. The goal is to conceal the very existence of the secret, not just to scramble its content. This is distinct from encryption, which protects the message’s content but not its presence; with steganography, the message looks like normal data, reducing suspicion. In practice, steganography can hide data in images, audio, video, text, or even network packets, and there are forensic techniques (steganalysis) to detect such hidden data. While it can be used alone, it’s common to combine steganography with encryption for added security.