To be honest this just seems like an insecure version of Keybase. The key thing with Keybase is that it cryptographically verifies your public keys against pub

To be honest this just seems like an insecure version of Keybase. The key thing with Keybase is that it cryptographically verifies your public keys against public statements published to accounts people know you by - eg your Twitter, Facebook, etc. The difficult bit isn't encrypting and sending. The difficult bit is the original key exchange. Keybase has dealt with this without you having to trust Keybase itself.