Which Steganography technique ensures creation of a cover for secret communication?

Cover generation techniques are specifically designed to create a cover for secret communication in steganography. This method involves generating a medium that is used to hide the secret information effectively. By creating a believable and innocuous cover, the hidden data can be concealed in such a way that it is difficult for an observer to detect its presence.

The essence of these techniques lies in their ability to produce a cover that appears normal and unaltered, thereby providing a safe environment for the secret message. This deception is vital in steganography, as the primary goal is to ensure that the existence of the secret communication remains undetected.

In contrast, other methods like substitution techniques involve replacing bits or pixels of the cover medium without generating a distinct cover, which can make detection easier. Transform domain techniques manipulate data in frequency domains but may not inherently focus on the generation of a cover. Spread spectrum techniques distribute the secret data over a wide frequency range rather than focusing specifically on creating a cover. Thus, cover generation techniques are directly aligned with the need to develop a protective and credible facade for secret communications.