Re: There is...
>When a US authority says something like this, that the crypto should have an easy way for legal authorities to open anything after 'due legal process', what they seem to mean more often than not is that there should be a an easy way for _US_ legal authorities to open the material after whatever the _US_ thinks is due legal process.
>They appear to see no issue with other country's legal process or authority, since those don;t matter to them.
>I'm also not sure which depresses me more - that they know what they're asking for is impossible, but are asking anyway so the Dear People see them 'doing something' - or that they really think it can be done. Sigh...
You're being silly. Indisputably, once you generate math that works differently in the presence of legal paper, it is trivial to make that math work differently only in the presence of U.S. legal paper.
I propose a different approach: here's a game to introduce at your next party. Call it the "Mike Rogers" Game." The object of the game is to express the maximum amount of obdurate ignorance while simultaneously making the broadest demands--in as few words as possible. Extra credit, of course, if your example is a quotation or precis of something you've actually heard someone say. Herewith a few samples:
"I don't know anything about Maxwell's Laws, but I don't see why it's impossible to build a refrigerator that generates power instead of consuming it. That would solve all our oil-dependancy problems. I think it CAN be done and it SHOULD be done."
"I failed second-grade arithmetic, but I don't see why 2 plus 2 always has to be 4. It would solve all our economic problems if accountants could just think outside the box and be more open to alternate ideas."
"Statistics? I never heard of it. But the average of these numbers would be higher if you just had more numbers."
The winner, of course, is acclaimed "Mike Rogers For A Day" and gets to peek in everyone else's underwear drawer.