IoT Security

Device security, protocols, vulnerabilities, and IoT-specific threats.

Overview

IoT security protects connected devices and networks.

IoT Security Challenges

IoT Architecture

┌─────────────────────────────────────┐
│           Cloud                     │
│  (Analytics, Management)            │
├─────────────────────────────────────┤
│           Gateway                   │
│  (Protocol translation)             │
├─────────────────────────────────────┤
│           Edge                      │
│  (Local processing)                 │
├─────────────────────────────────────┤
│           Devices                   │
│  (Sensors, actuators)               │
└─────────────────────────────────────┘

IoT Protocols

Device Security

# IoT device authentication
def authenticate_device(device_id, certificate):
    # Verify certificate chain
    if not verify_certificate(certificate):
        return False
    
    # Check device identity
    if not verify_device_identity(device_id, certificate):
        return False
    
    # Validate permissions
    if not check_device_permissions(device_id):
        return False
    
    return True

Vulnerabilities

Security Measures

1. Device authentication — Certificates, keys
2. Encrypted communication — TLS/DTLS
3. Secure boot — Integrity verification
4. Regular updates — Patch management
5. Network segmentation — Isolate devices

Practice

Implement secure MQTT communication for IoT devices.