I had some spare time yesterday. So I decided to develop a file compression format of my own called "GAO". Turns out it doesn't compare to other compression formats such as ZIP, RAR, and 7z. However I am curious how well it works as far as encryption goes. So to test it, I have uploaded two files. I have done a single layer of encryption on a file, and I want to see if anyone is capable of cracking it. If you are, post a comment and let me know what you found. I'll give you this much -- the header is 8 bytes long.
If you have a hex editor and want to give it a try, go ahead and download the original and the encrypted files. I don't know how effective my encryption format is, but hopefully I'll stump people. The first one to figure it out fully and post a comment explaining the format by October 27 will get a chance to try the ProSonic engine.