It's always kind of cute to see ridiculous headlines roll through. Taking a look at the paper and a stream of thought about it. - Researchers are affiliated with a university they aren't kooks - These are physicists. They speak a different language. That will make decoding this paper difficult. It may have useful insight, but it is obscured by the jargon of a different discipline. Typically I haven't see continuous d…
I think by unbounded they meant 'you can stick any number of arbitrarily complicated functions here'. I'm not sure whether this is any different in practice from just upping the key size on a cipher (since any implementation will be limited by at least memory used to represent the functions).