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Week 6 — End-to-End Secure Communication Architecture

Secure communication emerges from protocol integration, not isolated features.

1. Device Communication Stack​

A secure stack includes:

  • Hardware identity
  • Secure boot
  • TLS-encrypted transport
  • Protocol-level authentication

2. Cloud-Side Enforcement​

Cloud systems must enforce:

  • Device identity validation
  • Topic or API authorization
  • Rate limiting
  • Audit logging

3. Fleet-Level Security​

Design for:

  • Credential rotation
  • Device revocation
  • Incident response

Final Capstone​

Design a secure communication architecture for:

  • MQTT over TLS (Wi-Fi or Cellular)
  • BLE provisioning + cloud handoff

Include:

  • Authentication model
  • Key handling
  • Failure recovery

Week 6 Takeaway​

Communication security is successful only when device, network, and cloud trust align.