ACLid
ACLid is a term used to denote the unique identifier assigned to an entry within an access control list (ACL). It functions as a stable handle that distinguishes individual permission entries in an ACL, facilitating management, auditing, and policy evaluation. There is no universal specification for ACLid; implementations typically choose a numeric sequence, a UUID/GUID, or a short alphanumeric string. The format chosen can affect persistence, scoping, and how ACL revisions are tracked.
In practice, an ACLid is created when an ACL entry is added and is retained across updates
Across different domains, ACLid usage varies. In file systems, ACLids might be stored alongside permission bits
See also: Access control list, Identity and access management, Policy management, Audit trails.