Not really steganography, there is no password needed to recover the message, its more like hidden subliminal messaging in two images only available to those using software that supports HDR.<p>steganography is fun. I used to sent my son christmas and birthday card images with a hidden messages, explaining what secret adventure we would be going on, usually the location of our fishing trip or an addition to a basic christmas present.<p>steganography with Steghide:<p>steghide embed -cf picture.jpg -ef secret.txt<p>enter password twice<p>extract message:<p>steghide extract -sf picture.jpg<p>enter password<p>hidden message appears in terminal