Formal modeling of Privacy Act consent within delegation tokens

Construct a formal model that incorporates citizen consent scopes into SentinelAgent’s delegation tokens, including narrowing behavior analogous to authority scopes, to enable Privacy Act–compliant consent enforcement across multi-hop delegation chains.

Background

The current Delegation Chain Calculus models authority scope, policy constraints, and intent but does not model consent required by the Privacy Act for handling citizen PII.

The authors explicitly list Privacy Act consent modeling as an open problem that remains unaddressed, noting elsewhere that extending tokens with consent scopes would be a clean formal extension planned for a future version.

References

Remaining open problems. Collusion via side channels (analogous to covert channels in traditional access control), implicit influence propagation between chains without formal delegation steps, and Privacy Act consent modeling remain unaddressed.

— SentinelAgent: Intent-Verified Delegation Chains for Securing Federal Multi-Agent AI Systems  (2604.02767 - Patil, 3 Apr 2026) in Subsection "Threats to Validity", Section "Discussion and Future Work"