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Engineering — Reference Implementation
Auditor Topology Schematics
Purpose: Architecture topology schematics and compliance mapping matrices for presentation to DPOs, corporate auditors, and national competent authorities evaluating NIS2 Article 21, eIDAS 2.0 High LoA, and GDPR compliance.
Version: 1.0.0 | Last Updated: 2026-06-28 Dependencies: None (reference material — aggregates topology views from all other specs)
1. Global Zero-Trust Identity Fabric Topology
This diagram maps the end-to-end flow of cryptographic identity verification, token verification, and automated risk enforcement across regional enterprise boundaries.
text
[ USER EDGE REGION ] [ EUROPEAN TRUST NETWORK ] [ ENTERPRISE API EDGE SERVICE ]
+---------------------+ +---------------------------+ +-------------------------------+
| User Web Browser | | Official EUDI Wallet / | | Ingress Envoy Gateway Proxy |
| (WebAuthn Native | | Smart-ID Infrastructure | | (Policy Enforcement Point) |
| Navigator API) | +-------------+-------------+ +---------------+---------------+
+----------+----------+ | |
| | (OID4VP Token Exchange) | (gRPC ExtAuthz)
| v v
| (Secure Attestation Payload) +-----+---------------------+ +-------+---------------+
+-----------------------------> | ZTA Onboarding Engine | | gRPC Auth Engine (PEP)|
| (Policy Decision Point) | +-------+---------------+
+-------------+-------------+ |
| | (Active-Active Query)
v v
+-------------------------------------------+---------------+
| Global Multi-Region Active-Active Redis Cluster |
| - eu-central-1 (Frankfurt) <===> - eu-west-1 (Ireland) |
+-------------------------------------------+---------------+
^
| (Asynchronous SSF Kills)
+---------------+---------------+
| Automated SOAR Response Engine|
| (Incident Remediation Loop) |
+-------------------------------+2. Microsegmentation & Data Flow Blueprint
This schematic defines how data maps to regulatory mandates as it moves through the infrastructure.
text
[ Client Request ]
|
v
+------------------------------+
| Envoy Ingress Gateway | <--- Restricts inbound network paths (NIS2 Network Segregation)
+--------------+---------------+
|
| (gRPC Forward)
v
+------------------------------+
| gRPC Authz Service (PEP) |
+--------------+---------------+
|
+---> [ Read Local Redis Cache ] ---> Evaluates CAEP/SSF Revocation keys (<1.5ms)
|
v (Authenticated & Cleared)
+------------------------------+
| Core Enterprise Microsegment |
+--------------+---------------+
|
| (Emits Event Telemetry)
v
+------------------------------+
| Fluent Bit Log Daemon | ---> Encapsulates and structures logs as compliant JSON
+--------------+---------------+
|
| (Signs Log Payload with ECC_NIST_P256 hardware ring)
v
+------------------------------+
| Central SIEM Audit Storage | <--- Provides tamper-proof records for auditing (NIS2 Art 21)
+------------------------------+3. Compliance Mapping Matrix for Auditors
Use this matrix during corporate audits to map specific components of the technical architecture directly to European legal requirements.
| Regulatory Mandate | Specific Legal Provision | Architectural Component Implementation | Technical Evidence / Proof Element |
|---|---|---|---|
| eIDAS 2.0 | Level of Assurance (LoA) High | Cryptographic verification using the EUDI Wallet via the OID4VP presentation framework. | Decrypted JSON payload displaying assurance_level: "high" and signature verification against Member State trust lists. |
| NIS2 | Article 21 (MFA) | Passwordless multi-factor authentication enforced natively on device hardware enclaves using WebAuthn/FIDO2. | Client payload containing userVerification: "required" and enterprise attestation matching approved hardware configurations. |
| NIS2 | Article 21 (Incident Response) | Immediate session eviction using the Shared Signals Framework (SSF) and CAEP profiles. | Asynchronous eviction commands executed via ZtaRedisPipelineManager.revokeSession() within seconds of anomaly detection. |
| GDPR | Data Minimization | Processing biometric attributes locally in the device's hardware enclave; using selective disclosure via W3C verifiable credentials. | The identity database contains only public keys, counters, and anonymized identifiers (sub), with zero biometric data stored on the server. |
| EU AI Act | Article 12 (Traceability) | Generating unalterable logs for all automated risk engines and UEBA behavior analysis scoring. | Cryptographically signed, append-only SIEM logs generated by ZtaAutomatedResponsePlaybook capturing exact model telemetry inputs. |
4. Incident Response & Containment Control Matrix
When presenting this architecture to security auditors, use this timeline to demonstrate the performance and effectiveness of the automated response engine under simulated stress conditions.
text
[ T=0ms: Anomaly Intercepted ] ──> EDR detects a compromise or a WebAuthn replay attempt.
│
▼
[ T=+45ms: Log Processed ] ───────> Fluent Bit parses the anomaly event and routes it to the SIEM.
│
▼
[ T=+120ms: SOAR Ingestion ] ─────> The SIEM triggers an alert webhook to the ZtaAutomatedResponsePlaybook.
│
▼
[ T=+280ms: Active Eviction ] ────> The SOAR engine writes eviction records to the multi-region Redis cluster.
│
▼
[ T=+300ms: Zero Trust Block ] ──> Envoy API Gateways globally block all subsequent requests for the compromised session.
│
▼
[ T=+1.2s: Identity Locked ] ────> The administrative API suspends the user's Smart-ID profile to prevent self-recovery.Auditor Presentation Checklist
When walking compliance auditors through this architecture, be prepared to provide the following evidence:
- The Terraform Infrastructure Code: Proves the use of isolated, multi-region container networks and hardware-backed log encryption (KMS).
- The FIDO2 AAGUID Whitelist: Demonstrates strict management of approved corporate authenticators, satisfying supply-chain and asset-control requirements.
- The Chaos Testing Reports: Demonstrates system resilience by proving that local authentication checks continue to operate properly even during an inter-region WAN outage.
References
[1] https://eur-lex.europa.eu/eli/dir/2022/2555 [2] https://eur-lex.europa.eu/eli/reg/2024/1183 [3] https://gdpr.eu/ [4] https://digital-strategy.ec.europa.eu/en/policies/eidas-regulation