If you are interested in experimenting with steganography and my tools, I propose the following challenge.

This GitHub project is for a steganography tool. It has a PNG image of a stegosaurus with an encoded message.

The challenge is to use my tools to decode the message.

The steganographic algortihm is a bit different than the one I described in diary entry "Steganography Analysis With pngdump.py: Bitstreams".

If you are stuck and need a hint (ROT13): zngevk genafcbfvgvba

Next Saturday, I will post my solution.

Didier Stevens
Senior handler
blog.DidierStevens.com