CompTIA Security+ Question J-15

Which of the following can hide confidential or malicious data in the whitespace of other files (e.g. JPEGs)?

A. Hashing
B. Transport encryption
C. Digital signatures
D. Steganography

Answer: D

Steganography is the process of concealing a file, message, image, or video within another file, message, image, or video.

Note: The advantage of steganography over cryptography alone is that the intended secret message does not attract attention to itself as an object of scrutiny. Plainly visible encrypted messages, no matter how unbreakable will arouse interest, and may in themselves be incriminating in countries where encryption is illegal. Thus, whereas cryptography is the practice of protecting the contents of a message alone, steganography is concerned with concealing the fact that a secret message is being sent, as well as concealing the contents of the message.