My cousin post in this larger thread might answer most of your questions. Quick answers: the RSA + EC mix roughly mirrors TLS. The signature encryption is a re

My cousin post in this larger thread might answer most of your questions. Quick answers: the RSA + EC mix roughly mirrors TLS. The signature encryption is a recent update to make network analysis harder on passive listeners. Most of the implementors are hanging out in XMPP:theroom@conference.jabber.org until Telehash-based chat is stable (a month maybe?). We'd love to get more feedback.