DataLogger

Enterprise Serial Data Logging with AES-256 Encryption Production

🔐 Project Overview

A sophisticated Windows-based data logging application designed for high-performance serial port data capture with enterprise-grade security. DataLogger combines AES-256 encryption, hardware-locked licensing, and a comprehensive Windows Service + WPF architecture to provide secure, reliable data logging for mission-critical applications.

Multi-Channel Serial Support - Concurrent logging from multiple serial ports with 1000+ chars/sec throughput
AES-256 Encryption - Military-grade encryption for all logged data at rest
Hardware-Locked Licensing - RSA-4096 signature verification with machine binding
Windows Service Architecture - Background service for continuous data logging
WPF Desktop Interface - Rich UI for log viewing, configuration, and monitoring
Secure Key Management - Windows Credential Manager integration for encryption keys
Encryption Key Recovery - Comprehensive system for data recovery in hardware failure scenarios
Tamper-Evident Audit Logging - AES-256-GCM encrypted security event tracking

🎯 Key Features

📡
Multi-Channel Serial Logging - Capture data from multiple serial ports simultaneously with independent configuration
🔐
AES-256 Encryption - Real-time encryption of all logged data with minimal performance impact (<5% overhead)
🔑
Hardware-Locked Licensing - RSA-4096 license validation tied to machine fingerprint for license enforcement
🪟
Windows Service - Runs as system service for unattended, continuous data logging operations
📊
WPF Desktop Application - Rich interface for real-time monitoring, log viewing, and configuration management
📅
Daily Partitioning - Automatic log file rotation organized by date for easy archival and management
🔍
Tamper-Evident Audit Logging - Encrypted security event tracking for compliance and forensic analysis
💾
Encryption Key Recovery System - Secure recovery workflow for data access after hardware changes or key loss

🏗️ Architecture & Technology

Application Architecture

.NET Stack

.NET 10.0 C# 12 Windows Service WPF

Security

AES-256-GCM RSA-4096 NTFS ACL Credential Manager

Data & Storage

File-Based Storage Daily Partitioning Encrypted at Rest Hardware Binding

Architecture

Service-Based Contract-Driven Modular Design SOLID Principles

Core Components

DataLoggerCore - Shared library with all business logic, service implementations, and interfaces
DataLoggerService - Windows service handling background serial data logging and encryption
DataLoggerViewer - WPF application for log viewing, system configuration, and monitoring
DataLoggerManagement - Support tool for encryption key recovery and data re-encryption

Service Interfaces

ISerialPortService - Manages serial port communication and data reception
IEncryptionService - Handles AES-256 encryption and decryption with GCM mode
ILoggingService - Manages log file creation, writing, and daily rotation
IConfigurationService - Handles application configuration and settings persistence
IKeyManagementService - Manages encryption key generation, storage, and recovery
IFileSecurityService - Manages NTFS ACL security for encryption keys
ILicenseService - Validates hardware-locked licenses using RSA-4096

📊 Performance & Specifications

1000+

Chars/Sec Per Channel

<5%

Encryption Overhead

4096

RSA Key Size (bits)

256

AES Key Size (bits)

Technical Specifications

Framework: .NET 10.0 with C# 12.0
Platform: Windows 10/11 with Windows Service support
Throughput: 1000+ characters/second per channel minimum
Encryption: AES-256-GCM with secure key management
Licensing: RSA-4096 hardware-bound signatures
Storage: File-based with daily automatic partitioning
Security: NTFS ACL protection for encryption keys

🔐 Security Features

Encryption & Key Management

AES-256-GCM Encryption - Authenticated encryption for data integrity and confidentiality
Hardware-Bound Keys - Encryption keys tied to machine hardware for secure storage
Windows Credential Manager - Secure storage of sensitive encryption keys
NTFS ACL Security - File system level access control for key files
Key Rotation Support - Capability for encryption key rotation without data loss

License & Compliance

Hardware-Locked Licensing - RSA-4096 signatures tied to machine fingerprint
Tamper-Evident Audit Logging - AES-256-GCM encrypted security event tracking
License Activation Dialog - Secure, user-friendly license management
Graceful Degradation - Service continues with reduced functionality without license

Recovery & Disaster Recovery

Encryption Key Recovery System - Comprehensive workflow for data recovery
Hardware Migration Support - Tools for recovering data when hardware changes
Support Integration - Management tools for data re-encryption and recovery
Complete Audit Trail - All recovery operations logged and tracked

🧪 Testing & Quality

Comprehensive Test Coverage

Contract Tests - Validate interface implementations and service contracts
Integration Tests - Test service interactions and end-to-end functionality
Performance Tests - Validate throughput requirements and encryption overhead
Unit Tests - Test individual components, utilities, and business logic

Quality Assurance

100% interface contract compliance testing
Performance validation at 1000+ chars/sec
Encryption and key management testing
Windows service lifecycle testing
Security and tamper detection testing

📋 Development Roadmap

Phase 1: Core Components ✅ COMPLETE

✅ Machine ID Generator for hardware fingerprinting
✅ RSA License Validator with signature verification
✅ Secure Key Storage with Credential Manager integration
✅ Tamper Audit Logger with AES-256-GCM encryption
✅ Integration Tests (100% passing)

Phase 2: UI & Service Integration 🔄 IN PROGRESS

License Activation Dialog (WPF)
Settings page for license information
Service graceful degradation without license
Application hard exit requirement for DataLoggerViewer
User-friendly error handling and feedback

Phase 3: DCM License Generator 📋 PLANNED

Console application for license generation
RSA key pair management tools
License database and tracking system

🎓 What This Project Demonstrates

DataLogger showcases expertise in:

✅ Enterprise-Grade Security - AES-256-GCM encryption and RSA-4096 licensing
✅ Windows Service Development - Robust background services for continuous operations
✅ Encryption & Key Management - Secure key storage and hardware-binding
✅ WPF Desktop Applications - Rich user interfaces for system management
✅ Performance Optimization - 1000+ chars/sec throughput with minimal overhead
✅ Licensing Systems - Hardware-locked, tamper-evident activation
✅ Disaster Recovery - Comprehensive key recovery and data protection
✅ Test-Driven Development - Contract, integration, performance, and unit testing
✅ .NET Architecture - Service-oriented, SOLID principles, modular design
✅ Compliance & Security - Audit logging and tamper-evident tracking

📋 Project Status

DataLogger is a production-ready application with core functionality complete and active development on Phase 2 UI integration.

✅ Core encryption and licensing complete
✅ Windows Service architecture stable
✅ Performance validated (1000+ chars/sec)
✅ All integration tests passing
🔄 Phase 2 UI implementation in progress
📋 Phase 3 license generation tool planned