SecureURLParams is for Wowza 1.7.2. ModuleRTMPAuthenticate is for Wowza 2, both for securing RTMP publishing. The two versions are here:
http://community.wowza.com/t/-/45
There is a guide included.
If you have restreaming application, you need StreamNameAlias.
http://community.wowza.com/t/-/47
This also has a guide.
Richard