Only for Shoutcast Server Software users
AuthHash = Authorization Hash
Note: Although it's a commonly used typo, there's no such thing as an "autohash".
You need to register SHOUTcast DNAS v2 streams in the RMO to get an AuthHash. You then enter the AuthHash into the DNAS admin or config file (sc_serv.conf) which will then allow the stream to be listed in the SHOUTcast YP Directory.