http://occgshn6pz7y3zj26g4h3l62mw24gorql4g5f5wrvagj72mbr7ud3ayd.onion/irc_privacy_notice.html
These channels do not show up in replies to the WHOIS command,
except if the command was issued by a user who is also part of
the respective secret channel. There is a so called invisible mode, usermode +i, which prevents
other users within CyberiaIRC from finding you, unless they know
your exact nickname or are on the same channel as you.