3 ms·Or cryptography in general. Doesn't need to be public-key, could just as well be symmetric crypto.by wereHamster 14y agoOr cryptography in general. Doesn't need to be public-key, could just as well be symmetric crypto.quanticle 14y agoWell, sure. The one big advantage that public key crypto brings is that you don't need a separate channel for key exchanges.vl 14y agoWhile you don't need encrypted channel to get a public key, you still need authenticated channel.