ASP.NET Security Tutorials
Scott Mitchell, from 4GuysFromRolla.com, is writing a terrific tutorial series on ASP.NET Forms Authentication, Authorization, User Accounts, and Roles. This is a great series of articles on the use of ASP.NET’s built-in libraries to authenticate and identify visitors, lock down parts of your site through authorization, and manage users and roles. When it’s all finished, it is supposed to be a 14-part series or something like that. Here is the link: