# ZTDS.ai — Third-Party Independent Security Audit Specification & RFP
## Comprehensive White-Box Source Code Review, Cryptographic Verification & Invariant Conformance Testing Protocol

**Document ID:** ZTDS-SEC-2026-AUDIT-SPEC-V1  
**Standards Authority:** ZTDS AI Consortium & Standards Authority (BrandMeWeb Ecosystem)  
**Lead Author & Chief Architect:** Ilya Sibiryakov (ORCID: [0009-0002-0642-5985](https://orcid.org/0009-0002-0642-5985))  
**Status:** Official Security Specification & RFP SSOT  
**Effective Date:** 26 September 2026  

---

## 1. Executive Summary & Audit Charter

The Zero-Trust Data Sanitization (ZTDS RFC v1.0) standard defines a mathematical and operational framework for in-memory, client-side data de-identification and re-identification for Generative Artificial Intelligence (GenAI), Retrieval-Augmented Generation (RAG), and autonomous agent workflows.

To provide definitive, verifiable assurance to global enterprise CISOs, Data Protection Officers (DPOs), and statutory regulators, the ZTDS AI Consortium mandates an independent, third-party white-box security audit of the official ZTDS reference architecture.

This specification outlines the technical scope, threat model, attack vectors, assessment methodology, and passing criteria required for accredited external cybersecurity auditing firms (e.g., Cure53, Trail of Bits, NCC Group, Kudelski Security).

---

## 2. Auditor Qualification & Accreditation Criteria

Selected auditing bodies must satisfy the following baseline qualifications:
1. **Accreditation:** CREST-accredited, ISO/IEC 27001-certified, or SOC 2 Type II-compliant security testing laboratory.
2. **Specialized Expertise:** Demonstrated track record in:
   - High-throughput V8 / WebAssembly engine security.
   - Cryptographic protocol review (Ed25519, XChaCha20-Poly1305, Argon2id).
   - Privacy-preserving technologies and local endpoint execution models.
3. **White-Box Access:** Audits must be conducted with full access to unminified source code, build scripts, unit/integration test suites, and internal architecture documentation.
4. **Public Disclosure Agreement:** The final audit report must be published without redactions of critical findings, establishing complete transparency for the enterprise community.

---

## 3. Scope of Assessment & Target Components

The audit encompasses four core architectural tiers of the ZTDS reference implementation:

```
+-----------------------------------------------------------------------------------+
|                        AUDIT TARGET ARCHITECTURE (SSOT)                           |
+-----------------------------------------------------------------------------------+
| COMPONENT 1: In-Memory Tokenizer & Regex Engine (@ztds/core & @privacyscrubber/sdk)|
| - Regex evaluation engine, entity boundaries, and surrogate token generators.     |
+-----------------------------------------------------------------------------------+
| COMPONENT 2: Cryptographic Core & Transport Vault (Ed25519, XChaCha20, Argon2id)  |
| - Key derivation, signature minting/verification, canonical JSON serialization.   |
+-----------------------------------------------------------------------------------+
| COMPONENT 3: Stdio Model Context Protocol (MCP) Server                            |
| - Local JSON-RPC stream interception, tool-call masking, IDE pipeline boundaries.  |
+-----------------------------------------------------------------------------------+
| COMPONENT 4: Conformance CLI & Offline Attestation Engine (ztds-audit, verify)   |
| - Offline invariant checks, SHA-256 tree hashing, zero-telemetry enforcement.     |
+-----------------------------------------------------------------------------------+
```

### Specific Target Artifacts
1. **Sanitization Core:** `@ztds/core` and `@privacyscrubber/sdk` runtime parsing loop.
2. **Cryptographic Engine:** `lib/license-validator.js` and `lib/certificate-manager.js`.
3. **IDE Integration:** `@privacyscrubber/mcp-server` stdio stream interceptor.
4. **Audit Tooling:** `bin/ztds-audit.js`, `bin/ztds-verify.js`, and `bin/ztds-agent.js`.

---

## 4. Testing Vectors & Attack Simulations

The audit must rigorously execute the following five adversarial testing modules:

### Module A: Network Socket Egress Trap (Invariant 1 Verification)
- **Objective:** Mathematically and empirically prove $\Delta Egress(S) \equiv 0.00\text{ B}$.
- **Methodology:**
  1. Instrument the test runtime with kernel-level eBPF socket monitoring or dynamic socket monkey-patching (`http.request`, `https.request`, `net.Socket`, `dgram.createSocket`, `WebSocket`).
  2. Ingest 100,000 synthetic test prompts containing known high-entropy secrets (OpenAI API keys, AWS credentials, credit card numbers, US SSNs, clinical patient records).
  3. Trigger sanitization and de-tokenization.
  4. Assert that zero bytes containing substring matches or entropy fragments of sensitive cleartext cross the socket layer.

### Module B: Volatile RAM & Persistent Storage Leak Analysis (Invariant 3 Verification)
- **Objective:** Confirm that session token maps and cleartext are never committed to non-volatile secondary storage.
- **Methodology:**
  1. Run sanitization workloads in instrumented container and browser environments.
  2. Inspect secondary storage subsystems:
     - Browser storage: `localStorage`, `sessionStorage`, `IndexedDB`, `document.cookie`.
     - Host filesystem: temporary directories (`/tmp`, `AppData`), swap partitions, pagefiles, application crash dumps.
  3. Take active heap snapshots and core dumps. Perform automated string carving to verify that session maps are immediately dereferenced and garbage collected upon session termination.

### Module C: Algorithmic Complexity & ReDoS Fuzzing (Invariant 2 Verification)
- **Objective:** Verify sub-2ms latency ceiling and complete immunity to Regular Expression Denial of Service (ReDoS).
- **Methodology:**
  1. Subject all classification patterns to grammar-based algorithmic fuzzing using catastrophic backtracking payloads (e.g., deeply nested repeating characters, trailing non-matching tokens).
  2. Execute 10,000,000 permutations with input lengths up to 100,000 characters.
  3. Verify that parser execution time scales strictly linearly $O(n)$ with input length, with no exponential or polynomial degradations exceeding the 2.0ms latency ceiling.

### Module D: Cryptographic Protocol & Side-Channel Review
- **Objective:** Validate cryptographic integrity of Ed25519 signatures, Argon2id derivation, and XChaCha20-Poly1305 ciphers.
- **Methodology:**
  1. Review canonical JSON serialization for signature malleability or key-sorting bypasses.
  2. Test Ed25519 signature verification against RFC 8032 test vectors, corrupt signatures, and bit-flipped payloads.
  3. Verify constant-time comparison on all signature and tag verifications (`crypto.timingSafeEqual`) to prevent timing side-channel attacks.
  4. Validate CSPRNG entropy sources for nonces (`randombytes_buf` / `crypto.randomBytes`).

### Module E: Subprocessor & Telemetry Elimination (Invariant 4 Verification)
- **Objective:** Confirm complete absence of third-party telemetry domains or tracking endpoints.
- **Methodology:**
  1. Perform static AST analysis searching for known analytics SDKs (Mixpanel, Segment, Datadog, Sentry, Google Analytics).
  2. Inspect compiled npm tarballs (`npm pack --dry-run`) to guarantee zero vendor phoning-home, licensing heartbeats, or background analytics.

---

## 5. Vulnerability Classification & Passing Thresholds

Findings shall be classified according to the Common Vulnerability Scoring System (CVSS v3.1):

| Severity | CVSS v3.1 Score | Action Required | Certification Impact |
| :--- | :--- | :--- | :--- |
| **CRITICAL** | 9.0 – 10.0 | Immediate architectural remediation | **Instant Failure** |
| **HIGH** | 7.0 – 8.9 | Remediation required within 7 days | **Failure** |
| **MEDIUM** | 4.0 – 6.9 | Remediation or formal risk acceptance | Conditional Pass |
| **LOW / INFO** | 0.1 – 3.9 | Best practice recommendations | **Full Pass** |

### Clean Bill of Health Requirement
To receive the official **ZTDS Certified Reference Engine** designation:
- **0 Critical Severity findings.**
- **0 High Severity findings.**
- **100% compliance across all 4 ZTDS RFC v1.0 Invariants.**

---

## 6. Deliverables & Transparency Protocol

Upon completion, the auditing body must provide:
1. **Formal Executive Summary:** Attestation signed by lead security assessors.
2. **Comprehensive Technical Report:** Detailed vulnerability descriptions, reproduction steps, attack payloads, and verification scripts.
3. **Public Attestation Badge & Hash:** Cryptographically signed attestation receipt anchorable in `data/registry.json` and `docs/security/`.
4. **CISO Procurement Brief:** 2-page non-technical executive summary for Fortune 500 enterprise risk committees.