Final answer:
Steganography is the cryptography mechanism that hides secret communications within various forms of data.
Step-by-step explanation:
The term that means a cryptography mechanism that hides secret communications within various forms of data is Steganography. Steganography is the practice of concealing a message, file, or some other form of data within another file, message, or piece of data. This can include hiding information within images, audio files, or even text documents. By using steganography techniques, the hidden data is not easily detected, making it a suitable method for covert communication.