What does the term Principal mean in .NET Security?
<p>I'm reading this article
<a href="http://www.codeguru.com/Csharp/.NET/net_security/authentication/article.php/c7415/" rel="nofollow">http://www.codeguru.com/Csharp/.NET/net_security/authentication/article.php/c7415/</a></p>

<p>I still don't understand the concept of "Principal" (why this name) what's difference with just Identity in common language ?</p>

<p>For example in the tutorial I don't understand the distinction between UserIdentity and SecurityPrincipal ?</p>
