A zero knowledge system for voting?

Appledave
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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
 
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Appledave said:
... a system of voting where no one would be able to know what anyone else voted ...
This is what is actually implemented in democracies. Nobody knows (for sure) what anybody else votes for.
 
Quite sure OP was thinking about a way to do that cryptographically - in a way you could implement in a computer and do via the internet.
 

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