Adding Security to Mesh communication, prvisioning & dfu

[Meh]

Hey everyone!

We're developing a mesh-based product, yet I can't find proper documentation about encrypting these transmissions properly - both from the hardware and app sides. If you have any suggestions/tutorials, I'd love to hear them!

[Hieu]

Hey Meh,

Bluetooth Mesh has built in security. Most transmissions are encrypted. As a matter of fact, it is encrypted in a manner that with it is difficult to sniff the packet contents even knowing the key.

Nordic does have an Introduction to Bluetooth Mesh here: https://webinars.nordicsemi.com/introduction-to-bluetooth-mesh-4.
Besides that, the Bluetooth SIG itself provides a study guide for Bluetooth Mesh: https://www.bluetooth.com/blog/bluetooth-mesh-developer-study-guide-v2-0/.

Finally, proper documentation of the encryption can be found in the Bluetooth Mesh specifications: https://www.bluetooth.com/specifications/specs/?types=adopted&keyword=mesh&filter=