NTLM SSP is a Security Support Provider as used in the Microsoft Active Directory Security Support Provider Interface
The security of NTLMv1, NTLMv2 and MD4 and therefore all versions of NTLM SSP has been severely compromised and is considered Cryptographically Weak and lacks Collision Resistance.

Windows Server 2003 supports the NTLM Security Support Provider, Msv1_0.dll, to enable clients running versions of Windows earlier than Windows 2000 to authenticate.

NTLM is the default authentication protocol for Windows NT 4.0. The NTLM Security Support Provider includes the NTLM and NTLMv2 authentication protocols.

Windows Server 2003 can use the NTLM Security Support Provider for the following:

  • Client/server authentication
  • Print services
  • File access using CIFS/SMB
  • Secure RPC/DCOM-based services

More Information#

There might be more information for this subject on one of the following: