SIMULATION NOTICE: This document (audit, evaluation, response) is part of an AI-driven role-playing simulation conducted for project quality and governance testing. It does not constitute a formal legal or professional audit by any real-world entity.

1. Overview

The Web/A Product Team has completed the implementation of technical measures and system enhancements based on the "Guardrails for PoC Deployment (v7)" provided by the Red Team. This report details the specific security features implemented and their verification results.

2. Implemented Measures

2.1. Visual Guardrails (Automated Warnings)

To ensure users clearly recognize that the system is an experimental prototype and avoid the "illusion of safety," we have implemented the following features:

  • Maker UI Warning Banners:
    • Persistent red banners labeled "EXPERIMENTAL" and "PILOT MODE" are now visible in both the editor and preview panes of the Form Maker.
    • These banners include links to the Product Team's Implementation Plan for immediate access to risk information.
  • Automated Document Watermarking:
    • Modified generator.ts to inject an "EXPERIMENTAL" background watermark into all generated Web/A HTML documents.
    • Added a "PILOT PHASE" warning banner at the top of every generated document, advising against entering highly sensitive information. These elements remain visible when printed.

2.2. Human-Machine Parity (HMP) Enforcement

To mitigate the risk of hidden data being signed without the user's knowledge, we have strengthened the signing protocol:

  • Ghost Field Detection:
    • Implemented a real-time scanning logic that compares visible UI fields with the underlying JSON-LD data during the submission process.
    • If "ghost fields" (data not visible to the user) are detected, the system aborts the signature process and presents a warning dialog to the user.

2.3. Replay Attack Prevention

The verification layer has been hardened to prevent the reuse of Layer 2 (L2) encrypted envelopes:

  • Mandatory Replay Guard:
    • Updated src/core/vc.ts and src/core/l2crypto.ts to make the replayGuard hook a requirement for verification.
  • Aggregator Implementation:
    • Integrated a LocalStorageReplayStore into the Aggregator Browser. It records unique message identifiers (nonces) and automatically rejects duplicate submissions or double-counting of the same message.

2.4. Operational Constraints

  • TTL Enforcement: Confirmed the 72-hour Time-To-Live (TTL) policy for message delivery data on Web/A Posts and updated the system configuration guidelines.

3. Verification Results

Item Test Case Result
Warning Banners Does the generated HTML display warnings when opened? PASS
Watermark Is the "EXPERIMENTAL" watermark visible in print preview? PASS
HMP Check Is a warning shown when signing a form with injected hidden fields? PASS
Replay Prevention Does the aggregator report an error if the same file is uploaded twice? PASS

4. Conclusion

With these enhancements (v2.4.0), the Product Team believes all technical requirements for the PoC deployment, as defined by the Red Team, have been met. We will continue to conduct operational training, such as "Epoch Key Rollover" exercises, and further improve security based on pilot phase feedback.

End of Report