My memory on this is a bit foggy, but a couple of years ago one my math professors had a digression about a system of voting where no one would be able to know what anyone else voted. It involved the graph of a polynomial, and the kicker was that this system couldn't be implemented in society because it needed a truly continuous representation of the graph, which computers aren't able to do. Does anyone know what system this is? It's been bugging me for quite a while now, but I just can't seem to remember anything else about it :S