NTLM
NTLM (NT LAN Manager) is a suite of Microsoft security protocols used for authentication, integrity, and confidentiality in Windows-based networks. It provides challenge-response authentication between clients and servers, primarily in older Windows environments and legacy applications. While largely superseded by Kerberos, NTLM is still supported for backward compatibility in modern Windows systems.
Developers should learn NTLM when working with legacy Windows systems, applications requiring backward compatibility, or environments where Kerberos is unavailable. It's essential for understanding authentication flows in older enterprise networks, debugging authentication issues in mixed environments, and implementing or securing applications that rely on Windows-integrated authentication. Knowledge of NTLM is also valuable for security professionals assessing vulnerabilities in authentication mechanisms.