Thursday, 10 December 2015

What is a SID in Windows? How does it relate to Security Principals? How does it apply to ACLs?

An SID refers to Security Identifier in the Windows NT line of operating systems. It can belong to a user, user group or other Security Principal. The SID remains attached to the principal even if the object is renamed. Access Control Lists (ACLs) use SIDs to determine which objects can access what resources.

Follow on questions:

What is a security principal? A principal in Computer Security is an entity that can be authenticated by a computer system or network, it is an "authenticable object". It is referred to as security principal in the world of Java and Microsoft.

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