Edge Enforcement Analysis

THE BORDER
BEFORE THE APP.

Most attacks never need to touch application logic if the network edge lets a malformed, replayed, or unsigned request through. NonaShield's edge runs nine enforcement stages before a request reaches business code.

In Order, Every Request

The Edge Pipeline.

Header & Token Validation

Combined token format, ±60s clock skew, ≥256-bit nonce entropy, expiry, action allowlist.

Local Replay Guard

In-process rejection outside a 300-second window or a repeated nonce.

Distributed Replay Guard

Cross-instance check against Redis so a request can't be replayed via a different edge node — L1 local-dict fast path, fails open only on a Redis outage.

Signature Verification

ECDSA P-256-SHA256 over the canonical signed input, checked against that device's registered public key. Algorithm-agile branch stubbed for post-quantum ML-DSA-65.

Attestation & Binding Checks

Hardware attestation cert-chain validation and device-binding token correlation.

Bot Scoring

Composite 0–100 score: request-burst rate (30 req/10s), User-Agent fingerprinting, missing SDK headers — published for downstream fusion, never blocks alone.

ASN / IP Reputation

Blocks Tor exit nodes, anonymous VPNs, and hosting-provider IPs against a maintained hostile-ASN table on registration routes — 10-minute edge cache.

Rate Limiting

Per-IP (20r/s), per-user and per-device (10r/s) zones, plus dedicated login (20r/m) and device-enrollment (2r/m) throttles.

Backend Trust Orchestration

Final 8-element fail-closed assertion before a verified request is ever released to business logic.

// Coordinated Attack Detection

Botnet Correlation — cross-device signal correlation for coordinated traffic.
Organized Crime Cluster Detector — Neo4j graph scan for shared-IP / coordinated-timing rings, run every 15 minutes.
Bot Velocity Tracker — backend counterpart to edge bot scoring.

// Backend-Side Guards

Rate Limiter — Redis sliding-window, 20 req/device, 60 req/IP per 60s.
OCSP Checker — live certificate-revocation check per chain, fail-soft on OCSP-server outage only.
SSRF Guard — blocks outbound calls resolving to internal/metadata/private IP ranges.

The Full Surface

30+ Network, Edge & API Vectors.

Man-in-the-middle, anonymization, reputation, rate abuse and API-layer attacks — each a real, individually-named check in the network taxonomy, not a marketing category.

// Man-in-the-Middle & TLS

MITM TLS Anomaly TLS Pinning Failure TLS Downgrade Attack Encrypted MITM via User CA User CA Installed

// Proxy, VPN & Anonymization

Proxy Detected Proxy / Multi-Proxy VPN Detection VPN App Conflict Unsecured Wi-Fi Open Wi-Fi Indicator

// Network Reputation & Routing

ASN Abuse IP Reputation Abuse DNS Spoofing / Hijack 5G Network Slice Exploitation Quantum Threat (PQC roadmap)

// API Abuse

API Key Misuse API Rate Abuse REST Method Abuse GraphQL Abuse Unexpected API Sequence Shadow API Invocation LLM Prompt Injection

// Payload & Business Logic Abuse

Malformed Payload Parameter Pollution Payload Manipulation Idempotency Violation CSRF Token Missing Business Logic Abuse

What We Don't Overclaim

The edge terminates standard server-side TLS with live OCSP revocation checking — it does not currently enforce mutual TLS (client certificates). Device authenticity is instead established through the ECDSA-signed token and hardware attestation chain described above, which is where the actual device-identity guarantee comes from.

The Verdict.

"A firewall asks 'is this port open?' NonaShield's edge asks 'is this exact device, this exact second, cryptographically who it claims to be?'"

Nine-Stage Edge Enforcement

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THE BORDER BEFORE THE APP.