Since I now have some more spare time I have been working on a new tool that allows you to securely hide at most 4 pieces of information (each a maximum of 255 characters in length) inside a random pixel image. I am working on ways to use this technique inside real images, but that is somewhat more difficult and it may take a while to perfect, if it works at all.
The image appears to be a random pixel generated image with varying colours, usually with 50×50 pixels in dimension (but this is not required to be so). The image looks something like this:
… And when you open it in the decoder tool you get something like this:
The program is actually quite simple but the way in which the information is stored should make it quite difficult to break. However with the decoding tool I have designed, you need only open the image to retrieve the information. If anyone is interested in hearing more or has some ideas to contribute, please let me know. I will release more information about the system used and so on at a later time when I stabilize the idea and format.