Which of the following is the method of hiding data within another media type such as graphic or document?

Cryptanalysis is the study and practice of analyzing and breaking cryptographic systems, not hiding data inside other media.

Packet sniffing is the act of capturing and inspecting network traffic packets, which is a passive eavesdropping technique unrelated to data hiding.

Steganography (from Greek meaning 'covered writing') involves concealing data inside another carrier medium such as an image, audio file, or document, so that only the sender and intended recipient know a hidden message exists. Unlike encryption, it does not transform the data into unreadable form - it hides its very existence within an innocuous-looking file.

Spoofing involves impersonating a legitimate entity (IP address, email, DNS) to deceive systems or users, not concealing data within another file type.