- Implemented proper RFC 5869 compliant HKDF key derivation process
- Added Perfect Forward Secrecy (PFS) key for enhanced session security
- Improved key separation using unique info parameters for each derived key
- Enhanced salt size from 32 to 64 bytes for increased entropy
- Added comprehensive key validation and error handling
- Implemented proper ECDH + HKDF integration following Web Crypto API best practices
- Added metadata encryption key for enhanced data protection
- Improved compatibility with modern cryptographic standards (RFC 7748, NIST SP 800-56A)
-Enhanced logging and debugging capabilities for cryptographic operations
- Maintained backward compatibility while upgrading security infrastructure
Security improvements:
- Cryptographic isolation between different key purposes
- Enhanced protection against cross-key attacks
- Improved resistance to future key compromise scenarios
- Better compliance with OWASP cryptographic storage guidelines
Technical details:
- Refactored deriveSharedKeys() method for proper HKDF implementation
- Updated WebRTC manager to use new messageKey API
- Added comprehensive error handling and validation
- Improved browser compatibility with standardized cryptographic operations
- This update strengthens the existing security foundation with modern cryptographic practices while maintaining full system compatibility.
- Add manifest.json with full PWA configuration
- Support for installation on all platforms (iOS, Android, Desktop)
- Custom app icons (72x72 to 512x512) with maskable support
- App shortcuts for quick actions (Create/Join Channel)
- Protocol handlers for web+securebit:// links
- Share target integration
- Implement enhanced Service Worker (v4.0)
- Smart caching strategies (cache-first, network-first, stale-while-revalidate)
- Security-aware caching (excludes sensitive endpoints)
- Background sync for failed requests
- Offline fallbacks with custom error handling
- Response cloning fixes and CORS handling
- Add PWA Install Prompt Manager
- Cross-platform install detection and prompts
- iOS Safari specific installation guide
- Smart dismissal logic with retry mechanisms
- Install success notifications and user guidance
- Persistent install preferences with localStorage
- Implement comprehensive Offline Manager
- IndexedDB for offline data persistence
- Automatic message queuing and sync when online
- Session state recovery after connection loss
- WebRTC reconnection handling
- Real-time connection status indicators
- Offline guidance and help system
- Add offline-first features
- Message queue with priority and retry logic
- Session data preservation during disconnection
- Application state recovery
- Background sync registration
- Periodic cleanup of old offline data
- Enhanced user experience
- Connection status notifications
- Offline mode guidance and help
- Automatic sync notifications
- Reconnection progress indicators
- Platform-specific installation instructions
This implementation ensures SecureBit.chat works seamlessly offline while maintaining security and providing a native app-like experience across all platforms.
