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Week 5 — Cellular IoT Security

Cellular connectivity provides network-level security, but it is not sufficient alone.

1. SIM-Based Security​

Cellular networks authenticate devices using:

  • SIM credentials
  • Network authentication protocols

This protects network access, not application data.

2. Application-Layer Security​

Even with cellular:

  • TLS is required
  • Server authentication is mandatory
  • Data encryption is still necessary

3. Threats in Cellular IoT​

  • SIM cloning
  • Backend credential leaks
  • Rogue base stations

Week 5 Takeaway​

Cellular security complements — but does not replace — application-layer security.