Since making Kerberos the default Windows authentication protocol in 2000, Microsoft has been working on eventually retiring NTLM, its less secure and obsolete counterpart. Until NTLM gets disabled by default, Microsoft is working on shoring up defenses against NTLM relay attacks. How do NTLM relay attacks work? NTLM is a suite of Microsoft protocols that authenticate users and computers based on a challenge/response mechanism between the client (which seeks to be authenticated) and server (which … More →

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