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Security Review of Product Architecture: Critical Attack Surfaces and Mitigations

June 29, 2026

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Security Review of Product Architecture: Critical Attack Surfaces and Mitigations

Summary
This review identifies critical security risks in the product architecture, prioritizes attack surfaces, and outlines technical mitigations. Key risks include unimplemented DLP tools, missing supplier risk assessments, and data minimization violations. Disagreements centered on procedural vs. technical fixes for GDPR compliance. All critical risks require immediate technical implementation, not policy adjustments.

Key Risks and Mitigations

1. Unimplemented DLP Tools (A.8.12)

  • Attack Surface: Unmonitored data transfers between billing APIs and external systems.
  • Severity: Critical.
  • Mitigation: Deploy DLP tools with SIEM integration to monitor and block unauthorized cross-system data movement.
  • Status: Action item (parallel with data minimization rules).

2. Missing Supplier Risk Assessments

  • Attack Surface: Unvetted infrastructure components in cloud providers.
  • Severity: High.
  • Mitigation: Conduct supplier risk assessments for all third-party cloud services.
  • Status: Pending.

3. Data Minimization Violations

  • Attack Surface: Excessive metadata retention in usage-tracking logs.
  • Severity: Critical.
  • Mitigation: Implement field-level metadata pruning in the usage-tracking module. Remove non-essential fields from the logging pipeline.
  • Status: Action item (parallel with DLP tools).

4. End-to-End Encryption Gap

  • Attack Surface: Unencrypted API communications between client and server.
  • Severity: Critical.
  • Mitigation: Enforce AES-256 encryption for all user data in transit.
  • Status: Pending.

5. GDPR Breach Notification Delays

  • Attack Surface: Delayed incident response increases exposure window.
  • Severity: Critical.
  • Mitigation: Automate breach detection via SIEM alerts and pre-approve escalation paths.
  • Status: Disagreement — Praxis argues this is procedural; Subrosa insists technical fixes (e.g., SIEM integration) are required.

Decisions and Action Items

  1. Deploy DLP Tools and SIEM Integration

    • Owner: Subrosa.
    • Deliverable: SIEM alerts for unauthorized data transfers; DLP policies to block exfiltration.
    • Dependency: Parallel implementation of data minimization rules.

  2. Implement Data Minimization Rules

    • Owner: Subrosa.
    • Deliverable: Pruned usage-tracking logs; audit trail for metadata removal.
    • Dependency: Code patch in /workspace/projects/subcorp/app/usage-tracking/.

  3. Conduct Supplier Risk Assessments

    • Owner: Praxis.
    • Deliverable: Risk profiles for cloud providers (AWS, Azure, GCP).
    • Deadline: Q3 2026.

  4. Enforce End-to-End Encryption

    • Owner: Praxis.
    • Deliverable: TLS 1.3 enforcement with certificate pinning for billing APIs.
    • Deadline: Q3 2026.

Disagreements and Resolutions

  • GDPR Compliance:

    • Praxis argued that the 72-hour breach window is a procedural delay, not a technical risk.
    • Subrosa countered that automated detection (SIEM) and pre-approved escalation paths must be implemented as technical fixes, not policy adjustments.
    • Resolution: SIEM integration will be prioritized to meet regulatory timelines.

  • Data Minimization vs. DLP:

    • Subrosa emphasized parallel implementation of both rules to avoid cascading risks.
    • Praxis acknowledged the need for field-level pruning but deferred DLP tool deployment.
    • Resolution: Both mitigations are now marked as high-priority action items.

Final Pass

All critical risks (DLP, data minimization, encryption) require technical implementation. Procedural fixes alone are insufficient. The next review will validate SIEM integration and confirm DLP tool deployment.

File written to: output/reviews/2026-06-29__risk_review__review__security-review-of-our-product-architect__subrosa__v01.md

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