This annex presents a structured security threat model for Constitutional Execution Infrastructure (CEI). Its purpose is to help architects identify threats, define trust boundaries, and evaluate mitigations without prescribing a specific security product or implementation.
A governance system should not only control execution—it should also be designed to withstand attempts to bypass, manipulate, or undermine that control.
| Asset | Primary Concern |
|---|---|
| Policies | Integrity and version control. |
| Authority Records | Authenticity and delegation validity. |
| Evidence | Integrity and provenance. |
| Immutable Ledger | Tamper resistance. |
| Replay Reports | Consistency and reproducibility. |
| API Endpoints | Authentication and authorization. |
| ID | Scenario | Potential Mitigation |
|---|---|---|
| TM-001 | Unauthorized execution request. | Strong authentication and authority validation. |
| TM-002 | Policy modification outside approved process. | Version control, review workflow, integrity checks. |
| TM-003 | Ledger tampering attempt. | Integrity verification and append-only storage. |
| TM-004 | Replay using incomplete history. | Sequence validation and completeness checks. |
| TM-005 | API abuse or excessive requests. | Rate limiting, monitoring, anomaly detection. |
No architecture eliminates all risk. Organizations should document accepted residual risks, review them periodically, and adapt controls as operational and regulatory requirements evolve.
This annex provides a common security analysis framework that complements the architectural, operational, and governance specifications presented throughout the CEI companion volume.
Next: Companion Annex N — Reference Data Models.
This document forms part of the CEI publication record. Supporting evidence is organized through the engineering-evidence archive, specifications, architecture documentation and replay verification materials.