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In a Windows network, NT (New Technology) LAN Manager (NTLM) is a suite of Microsoft security protocols intended to provide authentication, integrity, and confidentiality to users.[1][2][3] NTLM is the successor to the authentication protocol in Microsoft LAN Manager (LANMAN), an older Microsoft product. The NTLM protocol suite is implemented in a Security Support Provider, which combines the LAN Manager authentication protocol, NTLMv1, NTLMv2 and NTLM2 Session protocols in a single package. Whether these protocols are used or can be used on a system which is governed by Group Policy settings, for which different versions of Windows have different default settings.
NTLM passwords are considered weak because they can be brute-forced very easily with modern hardware.[4]
- ^ "Introduction", NT LAN Manager (NTLM) Authentication Protocol Specification, Microsoft, retrieved 2010-08-15
- ^ "Session Security Details", NT LAN Manager (NTLM) Authentication Protocol Specification, Microsoft, retrieved 2010-08-15
- ^ Takahashi, T (2009-12-17), "Reflecting on NTLM Reflection", FrequencyX Blog, IBM Internet System Security (ISS), archived from the original on 2009-12-31, retrieved 2010-08-14
- ^ Cite error: The named reference
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