NT LAN Manager (NTLM) security authentication protocol created by Microsoft that provides authentication, confidentiality and integrity to users. NT LAN Manager (NTLM) is used for a lot of different applications and mainly to encrypt Windows users passwords.
NTLM is the successor to the security authentication protocol in Microsoft LAN Manager, an older Microsoft product and it is based on cryptographic function Md4 with few differences. NTML authenticate user using interactive login process which consist of a domain name, a user name, and a one-way hash of the user's password without sending the user's password over the wire.
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