🔐 AWS KMS Integration for LafaekStreet

Enterprise-grade security for Hedera blockchain transactions using AWS Key Management Service

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📚 Documentation Guide

Document	Purpose	Time to Read
Quick Start	Get KMS working in 5 minutes	5 min
Technical Deep Dive	Complete implementation details	15 min
Architecture Diagrams	Visual system architecture	10 min

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🎯 What This Does

Every citizen report in LafaekStreet is cryptographically signed and recorded on the Hedera blockchain. AWS KMS provides hardware-backed security for the signing keys.

┌─────────────┐      ┌─────────────┐      ┌─────────────┐      ┌─────────────┐
│   Citizen   │      │  LafaekStreet│      │   AWS KMS   │      │   Hedera    │
│   Report    │─────▶│   Backend   │─────▶│   (HSM)     │─────▶│  Blockchain │
│             │      │             │      │             │      │             │
│  "Pothole   │      │  Create TX  │      │  Sign TX    │      │  Immutable  │
│   on road"  │      │  + Hash     │      │  (secure)   │      │  Record     │
└─────────────┘      └─────────────┘      └─────────────┘      └─────────────┘
                                                │
                                    ┌───────────┴───────────┐
                                    │  Private key NEVER    │
                                    │  leaves AWS hardware  │
                                    └───────────────────────┘

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🛡️ Why AWS KMS?

Traditional Approach	AWS KMS Approach
❌ Private key in .env file	✅ Key stored in tamper-proof HSM
❌ Key can be stolen/leaked	✅ Key cannot be exported
❌ No audit trail	✅ All operations logged in CloudTrail
❌ Manual key rotation	✅ Automatic key rotation
❌ Single point of failure	✅ Multi-region backup

Security Certifications

• ✅ FIPS 140-2 Level 2 validated hardware
• ✅ SOC 2 compliant
• ✅ PCI DSS compliant
• ✅ HIPAA eligible

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⚡ Quick Verification

# Test KMS integration
python test_kms_integration.py

# Expected output:
# ✅ ALL KMS TESTS PASSED

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📁 Files in This Directory

File	Description
README.md	This overview (you are here)
QUICK_START_KMS.md	5-minute setup guide
AWS_KMS_IMPLEMENTATION.md	Complete technical documentation
KMS_ARCHITECTURE.md	Visual architecture diagrams
test_kms_integration.py	Test script to verify setup
install_kms_dependencies.sh	Dependency installation script

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🔗 Related Documentation

• Backend README - Main backend documentation
• Hedera Integration - Blockchain integration details
• Database Schema - How blockchain records are stored

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🆘 Quick Troubleshooting

Error	Solution
Module not found: Crypto	Run pip install pycryptodome==3.19.1
AWS_KMS_KEY_ID not configured	Add KMS ARN to .env file
AccessDeniedException	Check IAM permissions: kms:Sign, kms:GetPublicKey

For detailed troubleshooting, see AWS_KMS_IMPLEMENTATION.md.

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🔐 Hardware Security • 📜 Immutable Records • 🔍 Full Audit Trail