# Iot Security Framework

> Use when securing IoT devices and networks.

- Skill: `loopyluci/iot-security-framework` (Agent Skill)
- Install (CLI): `npx skillmds@latest add loopyluci/iot-security-framework`
- Raw SKILL.md: https://api.skillmd.com/api/skills/loopyluci/iot-security-framework/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Security
- License: MIT
- Author: LoopyLuci (https://skillmd.com/u/loopyluci)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/loopyluci/iot-security-framework

---


# IoT Security Framework

Securing IoT devices and networks — from device identity and firmware security through secure boot, OTA updates, network segmentation, and lifecycle management.

## When to Use

- Building secure IoT products and devices
- Securing IoT device communication and data
- Implementing firmware update mechanisms
- Managing device identities and certificates
- Isolating IoT devices on networks

## IoT Security Layers

```python
IOT_SECURITY_LAYERS = {
    'device_hardening': 'Disable unused ports, remove debug interfaces, tamper-resistant enclosures',
    'secure_boot': 'Verified boot chain — bootloader signs kernel, kernel signs filesystem',
    'firmware_security': 'Signed firmware, encrypted storage, secure OTA update mechanism',
    'identity': 'Unique device certificate (X.509), TPM or secure element for key storage',
    'communication': 'mTLS between device and cloud, certificate pinning, protocol buffers',
    'network': 'IoT VLAN segmentation, firewall between IoT and production, egress-only where possible',
}

# Secure OTA update flow
def secure_ota(current_version: str, update_package: bytes, 
               signature: bytes, device_cert: str) -> bool:
    import hashlib, json
    expected_hash = hashlib.sha256(update_package).digest()
    # Verify signature against device certificate
    if verify_signature(expected_hash, signature, device_cert):
        return apply_update(update_package)
    return False
```

## Verification Checklist

- [ ] Device identity provisioned (X.509 certificate per device)
- [ ] Secure boot enabled (verified boot chain)
- [ ] Firmware updates signed and verified before install
- [ ] mTLS for cloud communication
- [ ] IoT devices on isolated network segment (VLAN)
- [ ] Egress-only firewall rules (no inbound to IoT)
- [ ] TPM/secure element for key storage
- [ ] Device lifecycle management (decommissioning, credential revocation)
- [ ] Over-the-air (OTA) update mechanism tested and secure