What is Windows NT LAN Manager (NTLM)?

What does NTLM stand for?

Windows NT LAN Manager (NTLM) is a protection Protocol suite for Microsoft Windows NT four.Zero. NTLM cHanged Windows LAN Manager (LANMAN). NTLM is used for down-degree patron and Server compatibility as much as Windows 2000.

NTLM become changed with the aid of Microsoft Kerberos.

NTLM authenticates customers and servers via a undertaking-response technique composed of three messages, as follows:

• Negotiation: Advertises competencies
• Challenge: Establishes idEntity
• Authentication: Authenticates the Client or server

NTLM Makes use of one or Greater server-stored hashed Passwords for authentication. Each password price is a 16-byte LM hash or NT hash. Microsoft Does now not recommend NTLM for Modern Packages, because of weak Encryption.