Which of the following must a user implement if they want to send a secret message to a coworker
by embedding it within an image?

A.
Transport encryption

B.
Steganography

C.
Hashing

D.
Digital signature

Explanation:
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.