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The Windows web server called Internet Information Servies version 6 (hereafer referred to as IIS) has the ability to authenticate users using something called Interated Windows Authentication (hereafter called IWA, formerly called NTLM in previous versions of IIS). IWA is a secure method for users to prove to an IIS web server that they are who they say they are.
Many users are familiar with SSL encrypted web pages that ask them for their username and password which use visual cues such as a gold lock to indicate that their username and password will be transmitted securely over the Internet. For example, this is what Wells Fargo Bank customers see in the lower right hand corner of the FireFox 1.0 browser when they log into their account:
Web browsers such as Internet Explorer and Forefix 1.0 include support IWA.
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