I appreciate the feedback. My original problem was "How to send short strings of text (less that 256 characters) in a hidden form field between two different web sites?" I needed to make the string encrypted enough to not be worth breaking (I'm not passing CC numbers or anything like that).
After looking at some different schemes, my problem became 'How do I whip up a good pad?' and this was my answer. My question is, HOW secure is the above scheme? Are we talking about a couple of hours or a couple of minutes to crack? What if the pad was 32 bytes long? 64?
I whipped up the above code so that I could get some good crypto advice and maybe make something useful. I guess my 'big' question is, can someone break into a short section of text (~256 bytes), encrypted by this engine, without the password?
-oakbox
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