SPNEGO
Security protocol used with GSSAPI / From Wikipedia, the free encyclopedia
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Simple and Protected GSSAPI Negotiation Mechanism (SPNEGO), often pronounced "spenay-go", is a GSSAPI "pseudo mechanism" used by client-server software to negotiate the choice of security technology. SPNEGO is used when a client application wants to authenticate to a remote server, but neither end is sure what authentication protocols the other supports. The pseudo-mechanism uses a protocol to determine what common GSSAPI mechanisms are available, selects one and then dispatches all further security operations to it. This can help organizations deploy new security mechanisms in a phased manner.
SPNEGO's most visible use is in Microsoft's "HTTP Negotiate" authentication extension. It was first implemented in Internet Explorer 5.01 and IIS 5.0 and provided single sign-on capability later marketed as Integrated Windows Authentication. The negotiable sub-mechanisms included NTLM and Kerberos, both used in Active Directory. The HTTP Negotiate extension was later implemented with similar support in:
- Mozilla 1.7 beta[1]
- Mozilla Firefox 0.9
- Konqueror 3.3.1[2]
- Google Chrome 6.0.472[3]
- Google Chrome for Android m46[4] with Hypergate Authenticator.
- Microsoft Edge for Android v124[5] with Hypergate Authenticator.