In Wowza Media Server 3.5 there is an extra module already build in which can be used to Secure incoming rtmp streams to the server to prevent unauthorized streams. Some encoders aren’t able to use the user and password settings. I was curious if this module could be added in Wowza Streaming Engine 4. 0
attached is a tutorial

I assume you are already logged into the Engine manager and have setup a basic live application
My server ip: 192.168.10.17
OS: Ubuntu 12.04 – 64bit / Java 7
The 12345.doPublish: the 12345 can be changed to any password you want it to be.
Stream url in encoder before Module add:
rtmp://192.168.10.17/live
Streamurl in encoder after Module add:
rtmp://192.168.10.17/live/_definst_/doPublish=12345
My streamname in JWPlayer & vlc remain the same:
JWPlayer:
rtmp://192.168.10.17:1935/live/mp4:stream
VLC: rtsp://192.168.10.17:1935/live/mp4:stream
Just follow the images and you should be fine