The text here is hidden in the image on the top-right-hand side. The top-left image is the original. Can't tell the difference, right? That's thanks to steganography - we're embedding bits of the text by changing the brightness of these pixels *ever* so slightly. Go ahead and type something here, and watch the images change. The bottom-left image is the text as a binary grid, and the bottom-right image is an amplification of the changes we're making.