# Post-Quantum Signature Chaos Engineering Testing Plan.

## 1. Chaos Injection Scenarios

| **Chaos Type** | **Description** | **Test Case (Implied)** |
|----------------------|-----------------------------|-------------------------------------------------------------------|
| Network Partition | 30/70 node split | Test fork choice recovery and partition healing |
| Clock Skew | Shift clocks ±1–2s | Test slot boundary and signature timing issues |
| Signature Spam | Inject 10k fake sigs/slot | Test aggregation DoS and validator resilience |
| Validator Failures | Random validator shutdowns | Test finality under partial failure |
| Peer Flapping | Rapid peer connect/disconnect | Test gossip resilience and redundancy |
| Latency Injection | 500ms–2s delay on QUIC packets | Test validator slot timing thresholds |

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## 2. Structural Fault Simulation Test Cases

Fault injection scenarios to test protocol resilience.

| **Fault** | **Description** | **Test Case (Implied)** |
|-------------------------|---------------------------------------------|----------------------------------------------------------------------|
| Attestation Delay | One client delays attestations by 2s | Test impact on finality and fork choice |
| Bad BLS Params | One client uses incorrect BLS parameters | Test detection and isolation of cryptographic failure |
| Premature Aggregate | One client aggregates too early | Test attestation agreement and client divergence |

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## 3. Synthetic Load Tactics Test Cases

| **Tactic / Persona** | **Description** | **Test Case (Implied)** |
|------------------------|-------------------------------------------------|---------------------------------------------------------------------|
| Ghost messages | Valid-looking but invalid messages | Test message validation and resource exhaustion |
| Signature flooding | Inject high signature volume | Test memory/CPU limits, spam mitigation |
| Historical replay | Replay traffic time-compressed | Test validator behavior under real-time pressure |
| Lazy persona | Delays in processing | Test sync/finality robustness |
| Bursty persona | Periodic drop and reconnect | Test gossip and fork stability |
| Remote persona | Inject latency to simulate geographic distance | Test signature timing and gossip delay handling |

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## 4. Adversarial Failure Modes Test Cases

| **Scenario** | **Description** | **Test Case (Implied)** |
|----------------------------|--------------------------------------------------|-------------------------------------------------------------------|
| Signature Bottleneck | Increase signature complexity | Test validator throughput, missed attestations |
| Partition + Sig Load | Partition then spam both halves | Test view divergence and recovery |
| Memory Exhaustion | Extend sig lifetimes to grow memory | Test memory leak, GC, and crash protection |
| Eclipse + PQ Overhead | Isolate validators with old-but-valid sigs | Test view divergence and CPU cost of mitigation |
| Signature Grinding DoS | Expensive crafted signatures | Test mitigation like rate limiting and rejection heuristics |