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Security identifier (sid) is a unique, immutable identifier of a user account, user group, or other security principal in the windows nt family of operating systems. Jun 26, 2025a sid is used to uniquely identify a security principal or security group. What does sid stand for?

Looking for online definition of sid or what sid stands for? Sid is listed in the world's most authoritative dictionary of abbreviations and acronyms. Oct 1, 2025learn what a security identifier (sid) is in computer systems, how it works to identify user accounts, and why it’s crucial for maintaining secure access control.

Jul 21, 2025a security identifier (sid) is a unique, immutable value used in windows environments such as windows servers, oses, and active directory to identify security principals, control access,. Mar 8, 2022in the context of windows computing and microsoft active directory (ad), a security identifier (sid) is a unique value that is used to identify any security entity that the windows. Jul 10, 2025a security identifier (sid) is a unique value of variable length used to identify a trustee.