ACLids

ACLids are identifiers used in access control systems to reference either an access control list (ACL) as a whole or individual entries within an ACL. The term is not a formal standard; how ACLids are represented varies by system and may be numeric handles, GUIDs, or opaque strings.

They are used to enable efficient policy evaluation, auditing, and policy management. By resolving an ACLid to the corresponding permission set, software can quickly determine whether a subject has the required rights on a resource. ACLids can also support versioning and change tracking, helping maintain a history of policy decisions.

Typical data associated with an ACLid may include a resource identifier, an ACL version, one or more entry identifiers, the principal (user or group) to which a permission applies, the set of allowed operations, and timestamps for creation or modification. In some architectures, the ACLid is bound to the resource; in others, it refers to a shared policy object that can be applied across multiple resources.

Lifecycle and governance: ACLids are created by policy administrators or policy engines, may be updated to add or revoke permissions, and can be deprecated or revoked. When changes occur, systems may propagate updates to avoid stale permissions, depending on caching and synchronization strategies.

Security and interoperability: Protecting the ACLid itself is important to prevent unauthorized policy manipulation. In distributed systems, there may be translation layers between ACLids and human-readable ACL definitions to support interoperability.

Related topics include access control lists, policy-based access control, identity and access management, and security policy.