Enabling authentication before connecting to DFU service from nRF master control panel/toolbox app?

[Rifat Mahmud]

On the dfu bootloader example given on nrf51 SDK 8.1.0, how can I enable the pairing before connecting to it using the nRF toolbox Android app?

[shibshab]

You can modify the permissions of the characteristics that make out the DFU service to require pairing. This will trigger the appropriate security procedures, which you need to add handling to. See this message sequence chart.

I'm not sure about the nRF toolbox android app. It depends on whether the android BLE API will automatically perform the required security procedures (which I assume it will).