WCF: аутентификация по логину и паролю. Ссылки

http://codebetter.com/blogs/peter.van.ooijen/archive/2010/03/22/a-simple-wcf-service-with-username-password-authentication-the-things-they-don-t-tell-you.aspx

http://codebetter.com/blogs/peter.van.ooijen/archive/2010/04/09/a-simple-wcf-service-with-username-password-authentication-the-things-you-told-me.aspx