authentication).
GoVPN provides special encryptionless mode of operation. In this mode it
-replaces Salsa20 function used for confidentiality with rather
+replaces ChaCha20 function used for confidentiality with rather
well-known @url{http://people.csail.mit.edu/rivest/chaffing-980701.txt,
Chaffing-and-Winnowing} (CnW) technology. This is rather traffic and
resource hungry algorithm, so we use it after