Asked by: Henry Saleiro
technology and computing operating systems

What is Sid and rid?

Last Updated: 26th October, 2021

In the context of the Microsoft Windows NT lineofcomputer operating systems, the relative identifier (RID)isa variable length number that is assigned to objects atcreationand becomes part of the object's Security Identifier(SID)that uniquely identifies an account or group withinadomain.

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Also, what is the use of SID?

The SID is a unique name (alphanumericcharacterstring) that is used to identify an object, such as a useror agroup of users in a networkof NT/2000 systems. Windows grantsordenies access and privileges to resources based on ACLs,whichuse SIDs to uniquely identify users and theirgroupmemberships.

Secondly, what is SID and GUID? SID is longer for domains and smaller forlocalworkstations. To help you understand better, whenever a useriscreated a SID is assigned to the user, and theSIDhas access permissions assigned to it. GUID:Globally uniqueidentifier is a 128 bit hexadecimal value, thathelps uniquelyidentify an object in a forest.

Secondly, what is Microsoft Sid?

An SID, short for security identifier, is anumberused to identify user, group, and computer accounts inWindows. SIDsare created when the account is first created inWindows and no twoSIDs on a computer are ever the same. The termsecurity ID issometimes used in place of SID orsecurityidentifier.

How do I find my computer's SID?


  1. Press ⊞ Win + X . This opens the Windows“poweruser” menu at the bottom-left corner of thescreen.
  2. Click Command Prompt (Admin). A confirmation messagewillappear.
  3. Click Yes. Now you'll see a terminal window displayingthecommand prompt.
  4. Type WMIC useraccount get name,sid .
  5. Press ↵ Enter .

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