This is really an ugly cipher, and unless you really need it for compatability, I would recommend using something else... blowfish encryption even.
From what I gleened of the cipher, it shouldn't be too hard to reverse, but the code looks 5 years old and really needs to be cleaned up. I could probably knock it down to 10 lines and make it 10x faster, but again is truely an ugly cipher.
Consider what you need it for, and what else is available out there. If all you need is a weak cipher, then consider ROT13. Using it will increase your popularity just by it's sheer coolness.
- Raccoon
