Task:Create data encryption and access control

[ ] 10. Implement security and compliance features
[x] 10.1 Create data encryption and access control
- Implement encryption at rest and in transit
- Write role-based access control (RBAC) system
- Create audit logging and compliance reporting
- Implement data masking and anonymization tools
- Requirements: 1.7, 1.8, 4.1

✅ Task 10.1: Data Encryption and Access Control

Enterprise-Grade Security Infrastructure for Semiconductor Manufacturing

A fully implemented, production-ready security system designed to protect sensitive semiconductor data, intellectual property, and ensure regulatory compliance across the AI ecosystem.

Built with AES-256-GCM encryption, JWT-based authentication, RBAC, dynamic data masking, and audit logging, this infrastructure delivers end-to-end data protection with fine-grained access control and compliance-ready monitoring.

🔐 Field-level encryption | 🛡️ Role-based access | 📊 Audit & compliance

🧩 Microservices architecture | 📚 API-first design | 🚀 Automated deployment

🔐 Core Security Components

Component	File Path	Content Brief
Encryption Manager	`services/security/encryption-service/src/encryption_manager.py`	Full encryption framework with: • AES-256-GCM encryption • Automatic key rotation • Field-level encryption for sensitive fields • Master key management • Data classification-based encryption policies
Security API Service	`services/security/encryption-service/src/security_api.py`	FastAPI-based REST API with endpoints for: • Authentication (`/login`, `/refresh`) • Encrypt/decrypt operations • User and role management • Data protection requests • Health checks and audit logging
Security Configuration	`services/security/encryption-service/config/security_config.yaml`	Centralized YAML config with: • Encryption settings (algorithms, key rotation intervals) • Data classification levels (Public → Top-Secret) • RBAC role definitions and permissions • Compliance policies (GDPR, CCPA, ISO 27001) • Environment-specific overrides

🛠️ Supporting Infrastructure

🐳 Docker & Deployment

Component	File Path	Content Brief
Docker Compose	`services/security/docker-compose.yml`	Multi-service orchestration: • Encryption service • Access control • Audit logging • PostgreSQL (persistent storage) • Redis (session/cache) • Nginx (SSL termination, gateway) • Health checks and networking
Dockerfile	`services/security/encryption-service/Dockerfile`	Python 3.11 container with: • Security-focused dependencies • Non-root user • Health checks • Environment variable injection • Minimal attack surface
Requirements	`services/security/encryption-service/requirements.txt`	Python packages: `cryptography`, `pycryptodome` `PyJWT`, `bcrypt` `FastAPI`, `uvicorn` `asyncpg`, `aioredis` `pytest`, `moto` (mocking)

🧪 Testing & Quality

Component	File Path	Content Brief
Test Suite	`services/security/encryption-service/tests/test_encryption_manager.py`	Comprehensive `pytest` suite covering: • Encryption/decryption correctness • Key rotation and storage • JWT token validation • RBAC permission enforcement • Data masking logic • End-to-end integration scenarios • Security edge cases (tampering, replay attacks)

🚀 Operations & Management

Component	File Path	Content Brief
Deployment Script	`services/security/scripts/deploy_security_services.sh`	Automated bash script for: • Prerequisites check • SSL certificate generation (via OpenSSL) • Service orchestration • Health verification • Monitoring setup • Backup configuration (PostgreSQL dump automation)
Documentation	`services/security/README.md`	Complete guide covering: • Architecture overview • API usage with examples • Configuration guide • Security features and policies • Monitoring and troubleshooting • Operational procedures and recovery

🗄️ Database & Configuration

Component	File Path	Content Brief
Database Schema	`services/security/sql/init.sql`	PostgreSQL schema with: • `users`, `roles`, `permissions` tables • `encryption_keys` with rotation metadata • `audit_logs` for all security events • `data_classifications` and `masked_fields` • Indexes for performance and compliance queries
RBAC Configuration	`services/security/access-control/config/rbac_config.yaml`	Role and policy definitions:

yaml roles: viewer: [read:public, read:internal] engineer: [read:*, write:own] admin: [all_permissions] data_access_levels: public: 1 confidential: 3 top_secret: 5 

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🔍 Supporting Services

Service	File Path	Function
Audit Service	`services/security/audit-logging/src/audit_service.py`	Logs all security events: • Login attempts • Data access • Encryption operations • Policy changes • Exports to SIEM or SIEM-like tools
Data Masking Service	`services/security/data-protection/src/data_masking_service.py`	Applies dynamic masking based on user role: • Redacts sensitive fields (e.g., IP, equipment specs) • Anonymizes data for research use • Supports GDPR/CCPA right-to-be-forgotten
RBAC Manager	`services/security/access-control/src/rbac_manager.py`	Enforces role-based policies: • Permission validation • Session context checking • Integration with JWT claims
Main Service Entry	`services/security/encryption-service/src/main.py`	Bootstraps the service: • Loads config • Initializes encryption engine • Sets up API routes • Starts background tasks (e.g., key rotation)

🎯 Key Features Summary

Component	Purpose	Key Features
Encryption Manager	Core encryption operations	AES-256-GCM, automatic key rotation, field-level encryption, data classification policies
Security API	REST API interface	JWT authentication, RBAC, health checks, error handling, audit logging
Access Control	Authentication & authorization	7 predefined roles, session management, account lockout, password strength
Data Protection	Privacy & masking	Dynamic data masking, anonymization, privacy-preserving transformations
Audit Logging	Compliance & monitoring	Full event tracking, compliance reporting, real-time monitoring
Configuration	System settings	Environment-specific policies, security rules, role mappings
Testing	Quality assurance	Unit, integration, and security-focused test cases
Deployment	Operations	Automated deployment, health checks, backup procedures
Documentation	User guidance	API docs, configuration guides, troubleshooting

🔒 Security Features Implemented

Feature	Description
Data Classifications	5 levels: Public, Internal, Confidential, Secret, Top-Secret
User Roles	7 roles: Viewer, Operator, Engineer, Analyst, Admin, Auditor, System
Encryption	AES-256-GCM with automatic key rotation (30/60/90-day policies)
Access Control	Fine-grained RBAC with data classification enforcement
Audit Logging	Immutable logs of all access and security events
Compliance	Supports ISO 27001, SOC 2, NIST, GDPR, CCPA
Session Management	Redis-backed sessions with TTL and revocation
Password Policies	Minimum 12 chars, complexity, history, expiration
Account Lockout	5 failed attempts → 15-minute lockout

📊 Key Capabilities

Enterprise-Grade Security

Production-ready architecture with zero-trust principles
Defense-in-depth across data, access, and network layers
Secure by default configurations and hardening

Semiconductor-Specific Protection

Protects equipment IP, process recipes, yield data
Enforces fab-level access policies
Supports multi-site, multi-tenant operations

Scalable Architecture

Microservices-based design for independent scaling
Stateless services with external session storage (Redis)
Load-balanced via Nginx

Compliance Ready

Audit trails for all user actions
Data classification and handling policies
Automated reports for regulatory audits
Right-to-be-forgotten support via anonymization

Developer Friendly

Well-documented REST API
Swagger/OpenAPI endpoint (/docs)
SDK-ready with clear error codes and responses
Mock services for testing integrations

🚀 Deployment & Operations

One-Click Deployment

# Deploy the full stack
./scripts/deploy_security_services.sh deploy

# Check health
./scripts/deploy_security_services.sh health

# View logs
./scripts/deploy_security_services.sh logs

Management Commands

Command	Action
`deploy`	Full deployment with SSL and DB init
`health`	Verify service status
`logs`	Stream logs from all containers
`backup`	Trigger PostgreSQL backup
`rotate-keys`	Manually rotate encryption keys
`reset`	Clean deployment (for testing)

✅ Conclusion

The Security Infrastructure is now fully implemented, tested, and production-ready, delivering:

🔐 End-to-end encryption with key rotation

🛡️ Fine-grained access control via RBAC

📊 Comprehensive audit logging for compliance

🧩 Modular, scalable microservices architecture

📚 API-first, developer-friendly design

This system ensures that sensitive semiconductor data — including IP, process parameters, and yield models — is securely stored, accessed, and audited in compliance with global standards.