It's not totally impractical. Paillier, for example, has nice applications in electronic voting (since you can sum votes without reading who those votes were fo

It's not totally impractical. Paillier, for example, has nice applications in electronic voting (since you can sum votes without reading who those votes were for). http://en.wikipedia.org/wiki/Paillier_cryptosystem http://en.wikipedia.org/wiki/Paillier_cryptosystem But yeah, anything more than that is currently not all that practical.