Hide in plain sight.

Steganography hides a secret message inside an ordinary-looking image by making tiny changes to its pixels, too small to see. Hide a message in a picture, or pull one back out.

Awareness tip: steganography is how attackers sneak data past filters that only look at file types and text. A perfectly innocent image can carry a hidden payload, which is why some secure environments inspect or re-encode images on the way in.