Authorization Relationship Check¶
Software control — instantiates Relation Constraint Enforcement
A runtime access control that validates whether the relationships among actor, resource, permission, and delegated authority authorize a requested action before it is allowed.
An Authorization Relationship Check decides, at the moment a request arrives, whether the authority relationship between a caller and what it is trying to touch is valid. Its defining move is that it judges a live relationship — this actor, this resource, this permission, this delegation chain — rather than a record's existence or a stored structure. Every individual piece may be legitimate (the user is real, the resource is real, the permission exists) yet the pairing be unauthorized: the user holds the permission for a different tenant, the delegation points the wrong way, or the grant was revoked an hour ago. The check evaluates that relationship against the governing identity-and-permission model and returns allow or deny, logging the decision as it goes.
Example¶
A multi-tenant SaaS platform exposes a billing-export API. A background integration presents a token and asks to read tenant Northwind's export. The Authorization Relationship Check evaluates the relationship, not just the token: does the caller's role grant billing:read scoped to Northwind specifically; is the token an on-behalf-of delegation that Northwind itself granted to the integration (grantor to grantee, not the reverse); is that grant still unexpired and unrevoked? The integration turns out to hold billing:read only for tenant Acme. The relationship — Acme's grantee reaching into Northwind's resource — is not authorized, so the request is denied and the decision is written to the access log with actor, resource, and reason.
The wrong data never leaves the boundary, and because the denial is recorded, a later audit can reconstruct exactly why. Nothing about the integration's code is assumed trustworthy; the check simply refuses a relationship the permission model never sanctioned.
How it works¶
- Intercept at the decision point. A policy-enforcement point sits in the request path and hands the relationship to a policy-decision point before the action proceeds.
- Test compatibility. Confirm the actor-role is permitted to hold this permission on this resource kind under the model (RBAC, ABAC, or relationship-based access control).
- Test direction. Confirm any delegation or "act-on-behalf-of" edge points the sanctioned way and has not been reversed or chained past its allowed depth.
- Test currency. Confirm the grant is unexpired and unrevoked, then emit allow / deny and append the decision to the access log.
Tuning parameters¶
- Policy model — RBAC, ABAC, or ReBAC. Richer models express finer relationships but are costlier to author and reason about.
- Default stance — deny-by-default versus allow-by-default. Deny-by-default is safe and occasionally blocks legitimate work; the reverse leaks.
- Delegation depth — how many hops a chained "on-behalf-of" may traverse. Deeper chains enable real workflows and widen the confused-deputy surface.
- Decision cache TTL — how long an allow is cached. Longer caches cut latency but can honor a grant that was just revoked.
- Log verbosity — full context per decision versus deny-only. More detail aids audit at storage and privacy cost.
When it helps, and when it misleads¶
Its strength is that every access becomes an explicit, testable, logged decision about a relationship rather than an implicit trust. It catches standing privilege the organization forgot to revoke and cross-tenant reaches that look fine one field at a time.
Its failure mode is that it only enforces the model as encoded. A permission modeled too broadly — a wildcard scope, an over-generous role — passes cleanly, and the green light lends false assurance that access was vetted. A stale decision cache can honor a revoked grant. The sharpest trap is the confused deputy: a privileged intermediary tricked into wielding its own authority on behalf of a caller who lacks it, so a check that inspects only the immediate caller waves the request through.[1] The guarding discipline is to deny by default, keep delegation chains explicit and short, thread the original caller's identity through every hop, and periodically reconcile granted authority against authority actually used.
How it implements the components¶
This tool fills the runtime authority-decision slice of the archetype:
compatibility_rule— encodes which actor-role may hold which permission on which resource kind, and refuses pairings outside that set.directionality_rule— enforces the direction of delegation and grant edges, so "acts on behalf of" cannot be silently inverted.validation_rule— the request-time decision logic that turns the permission model into an allow/deny test.enforcement_point— the policy-enforcement point in the request path where the check intercepts before the action is authoritative.audit_trail— the access-decision log recording actor, resource, verdict, and reason for later reconstruction.
It does not declare the relation_schema or enforce a cardinality_rule on stored references at write time — that referential work belongs to Foreign-Key Constraint, its nearest software twin — and it does not run the scheduled monitoring_signal that Relational Integrity Test Suite keeps. Foreign-Key Constraint guarantees at database-write time that a referenced record exists; Authorization Relationship Check decides at request time whether an actor's authority relationships permit an action.
Related¶
- Instantiates: Relation Constraint Enforcement — it validates authority relationships at the point of access so unauthorized ones never become effective.
- Consumes: Policy Relation Rule — supplies the written authority rules the check enforces.
- Sibling mechanisms: Foreign-Key Constraint · Graph Schema Validation · Relational Integrity Test Suite · Dependency Constraint Check · Policy Relation Rule · Workflow Transition Guard · Role Compatibility Check
Editorial Notes¶
Form Classification¶
Form family: Control, Automation & Runtime
Rationale: A runtime access control that validates whether the relationships among actor, resource, permission, and delegated authority authorize a requested action before it is allowed, making its operative form a state-dependent executable control that senses, filters, routes, or actuates during operation.
Independent corroboration: The frozen evidence defines Authorization Relationship Check as 'A runtime access control that validates whether the relationships among actor, resource, permission, and delegated authority authorize a requested action before it is allowed', so its operative form is Control, Automation & Runtime.
Review outcome: Independent reviewer agreement; high confidence.
Origin Attribution¶
Primary origin: Computer Science & Software Engineering
Origin pattern: Single lineage
Present-day reach: Specialized
Rationale: Relationship-based access control validates actor-resource-permission paths at runtime before allowing an operation.
Related originating lineages:
- Law & Governance — Delegation and jurisdiction concepts shape the authority relationships represented.
- Security Studies & Intelligence Analysis — Security engineering supplies enforcement and least-privilege requirements.
Review resolution: Computer science is the agreed primary lineage through relationship-based access control. Security practice and legal delegation materially shape live authorization graphs, while the runtime check remains a canonical specialized computing mechanism.
Review outcome: Reconciled after independent review; high confidence.
References¶
[1] The confused deputy problem — a program holding legitimate authority is induced by a less-privileged caller into exercising that authority on the caller's behalf. Named by Norm Hardy (1988), it is why authority checks must track the original requester through a delegation chain, not just the immediate actor. withdrawn registry ↩