[tshadwell]

I remember pretty clearly reading a comment by the author of the paper about the 'unbreakable obfuscation' in which he said that the paper was greatly misrepresented in that it had made a proof in a specific problem domain that wasn't so applicable to real software.

I'm pretty sure it was posted on HN at some point. I don't remember the term IO being used, so it may have been a different kind of obfuscation. There were some allusions made to an unsolvable jigsaw puzzle.