SPNEGO
termsecurityweb dev
Simple and Protected GSS-API Negotiation Mechanism: the wrapper that carries a Kerberos service ticket inside HTTP's Negotiate authentication scheme, letting a browser authenticate to a website silently from the user's existing domain session.
The server challenges with WWW-Authenticate: Negotiate; a browser configured to trust the site answers with a ticket - the machinery marketed as Integrated Windows Authentication.
Also known as: Negotiate, Integrated Windows Authentication, IWA