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.
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.
steganography with Steghide:
steghide embed -cf picture.jpg -ef secret.txt
enter password twice
extract message:
steghide extract -sf picture.jpg
enter password
hidden message appears in terminal
3
1