Information, Computer and Network Security Terms Glossary and Dictionary

NTLM: NT LAN Manager

NT LAN Manager(NTLM), now called Integrated Windows Authentication(IWA), is the authentication protocol used by Microsoft Windows NT. Like certain other protocols, IWA sits on top of HTTP. Web-browsing software uses it as a single sign-on mechanism, so browsing users can transparently log onto web services using their Microsoft Windows credentials. Microsoft developed IWA, and it occurs mostly in Microsoft products, though other sets of software have implemented it as well, as in the Mozilla Firefox web-browser, the Apache web-server and the shell utility cURL.

Related Terms

NTLM: NT LAN Manager