http://en.wikipedia.org/wiki/Direct_Client-to-Client
Quote:
A variation of the DCC protocol called SDCC (Secure Direct Client-to-Client), also known as DCC SCHAT supports encrypted connections.


Since normal DCC is unencrypted it would be great to have the ability to make secure connections.

There is another irc client which already supports SDCC / SCHAT.

Also the newest cvs version of eggdrop does support SDCC / SCHAT now.