The receiver and sender find each other using the first three characters of the passphrase to establish a channel to communicate. Once in the channel they perfo

The receiver and sender find each other using the first three characters of the passphrase to establish a channel to communicate. Once in the channel they perform PAKE which will allow both parties to establish a secure key from the entire passphrase OR it will alert both parties that the passphrases differ and will break the channel (PAKE only works if the passphrase is the same, even if they made it to the same channel). The sender and receiver know who the relay is beforehand. That is they either use the default relay (baked into the croc binary) or specify another relay.