Advanced Features - Quick Reference

Implementation Priority

🔴 High Priority (Production Critical)

1. EncryptedFileLocalKeyStore - Required for secure key storage
2. Message Encryption at Rest - Required for data protection
3. MongoDB Storage - Alternative backend for flexibility

🟡 Medium Priority (Scalability)

1. Message Archiving - Cost optimization
2. Message Replication - High availability

🟢 Low Priority (Nice to Have)

1. Advanced Search - Enhanced query capabilities
2. Message Analytics - Business intelligence
3. Key Rotation Automation - Operational efficiency

Quick Implementation Estimates

Feature	Complexity	Estimated Time	Dependencies
EncryptedFileLocalKeyStore	Medium	1-2 weeks	BouncyCastle
Message Encryption at Rest	Medium	1-2 weeks	Encryption keys
MongoDB Storage	Low	1 week	MongoDB driver
Message Archiving	High	2-3 weeks	Cloud storage SDK
Message Replication	High	2-3 weeks	Multiple databases
Advanced Search	Medium	2 weeks	Full-text search engine
Message Analytics	Medium	1-2 weeks	Analytics framework
Key Rotation Automation	Medium	1-2 weeks	Scheduling framework

Implementation Order

Phase 1: Security (Weeks 1-4)

1. EncryptedFileLocalKeyStore
2. Message Encryption at Rest
3. MongoDB Storage (if needed)

Phase 2: Scalability (Weeks 5-8)

1. Message Archiving
2. Message Replication

Phase 3: Advanced Features (Weeks 9-12)

1. Advanced Search
2. Message Analytics
3. Key Rotation Automation

Key Files to Create

EncryptedFileLocalKeyStore

• crypto/secret/encryption/KeyEncryption.kt
• crypto/secret/EncryptedFileLocalKeyStore.kt

Message Encryption at Rest

• storage/encryption/MessageEncryption.kt
• storage/encryption/EncryptionKeyManager.kt

MongoDB Storage

• storage/database/MongoDidCommMessageStorage.kt

Message Archiving

• storage/archive/ArchivePolicy.kt
• storage/archive/MessageArchiver.kt
• storage/archive/S3MessageArchiver.kt

Message Replication

• storage/replication/ReplicationManager.kt
• storage/replication/ReplicaHealthCheck.kt

Advanced Search

• storage/search/AdvancedSearch.kt
• storage/search/PostgresFullTextSearch.kt

Message Analytics

• storage/analytics/MessageAnalytics.kt
• storage/analytics/PostgresMessageAnalytics.kt

Key Rotation

• crypto/rotation/KeyRotationPolicy.kt
• crypto/rotation/KeyRotationManager.kt
• crypto/rotation/ScheduledKeyRotation.kt

Dependencies to Add

// MongoDB
implementation("org.mongodb:mongodb-driver-kotlin-coroutine:4.11.0")

// AWS S3 (for archiving)
implementation("software.amazon.awssdk:s3:2.20.0")

// Optional: Elasticsearch (for advanced search)
implementation("co.elastic.clients:elasticsearch-java:8.11.0")

Testing Requirements

Each feature should have:

• Unit tests (80%+ coverage)
• Integration tests
• Performance tests
• Security tests (for encryption features)

Documentation Requirements

• API documentation
• Usage examples
• Configuration guide
• Migration guide (if applicable)
• Security considerations

For detailed implementation plans, see Advanced Features Implementation Plan.