Where can I find some good WS-Security introductions and tutorials? | Can anyone point me to some decent introductions to WS-Security?


I'm looking for tutorials or something that provide a fairly gentle introduction to the subject, though I don't mind if it assumes basic knowledge of web services and SOAP. Most of the stuff I've seen so far is very technical and you need a lot of complex, detailed background knowledge to understand it properly.


We have to implement a web service in PHP and one or more clients in .NET, so resources covering both would be much appreciated.