I was recently doing a presentation about using PowerShell to access Web services, covering some of the things I've discussed in this column over the past few months, when someone asked me, "What kind of encryption and authentication do Web services use?" I have to admit that I didn't have an answer for a moment. The question had awakened the "Windows security mechanics" part of my brain, which came up all blanks. But then some other neurons woke up, and I remembered the answer.
