Utility Mill

This cool cryptographic tool created by Lenny Domnitser lets you hide arbitrary text inside of an image using the black art of steganography

Steganography is the art and science of writing hidden messages in such a way that no one apart from the sender and intended recipient even realizes there is a hidden message.

Once you've encoded a hidden message in an image. You can decode it with this utility.

Usage Notes

1. Make sure you choose the format that matches the image you're using.
2. Only PNG and BMP currently work.
3. If you get an error, try a different image, preferably a smaller one (less than 100KB). Our memory is limited :-(

Get the most recent version of Lenny's Stepic code here.