A Security Identifier (SID) is a unique value of variable length that is used to position a safety principal or safety grouping inwards Windows operating systems. Well-known SIDs are a grouping of SIDs that position generic users or generic groups. Their values rest constant across all operating systems.
Windows Security Identifier
Windows grants or denies access in addition to privileges to resources based on access command lists (ACLs), which purpose these SIDs to uniquely position users in addition to their grouping memberships. When a user logs into a computer, an access token is generated that contains user in addition to grouping SIDs in addition to user privilege level. When a user requests access to a resource, the access token is checked against the ACL to permit or deny item activeness on a item object.
SIDs are useful for troubleshooting issues amongst safety audits, Windows server in addition to domain migrations.
SID has format equally follows: S-1-5-21-7623811015-3361044348-030300820-1013
S – The string is a SID.
one – The revision score (the version of the SID specification).
v – The identifier authorisation value.
21-7623811015-3361044348-030300820 – domain or local estimator identifier
1013 – a Relative ID (RID). Any grouping or user that is non created yesteryear default volition convey a Relative ID of thou or greater.
Possible identifier authorisation values are:
0 – Null Authority
one – World Authority
two – Local Authority
three – Creator Authority
four – Non-unique Authority
v – NT Authority
nine – Resource Manager Authority
Windows SID Resolver is a costless utility that allows you lot to resolve a Windows SID. Simply instruct inwards the SID you lot desire to resolve, in addition to the utility volition position what problem organisation human relationship the SID is from.
Additional data is available on KB243330.