No source, no actual mention of how it works besides curve25519, and only available for 'Mac'.
I don't have a lot of confidence that this is secure or useful, but it sounds like it is already useless because it fails over to normal DNS and the attacker this is targeted at can just as easily block the traffic and force you to downgrade.
I don't have a lot of confidence that this is secure or useful, but it sounds like it is already useless because it fails over to normal DNS and the attacker this is targeted at can just as easily block the traffic and force you to downgrade.