Add BLE secure pairing (level 4) with LTK support for nRF5340 Zephyr NCS v2.6.0

[Rajsinha11]

Hello Nordic team,

I am working on MCU nRF5340 and NCS v2.6.0 for BLE secure pairing level 4 with adding LTK (Long Term Key) share support. But, I am unable to find the supported document or example code for which supports LTK while secure BLE pairing.

Can any one help on this?

Regards

Raj

[Hung Bui]

Hi Raj,
By default if the device support bonding it will support exchanging/generating LTK. 

I would suggest to take a look at our Dev Academy course here: https://academy.nordicsemi.com/courses/bluetooth-low-energy-fundamentals/lessons/lesson-5-bluetooth-le-security-fundamentals/

LTK is discussed in Pairing process , at phase 3. 

Bonding hands on example is at Exercise 2.