BLE Pairing and security

[Swapnil Karkare]

Hi,

We would like to impelement Pairing and security features in our device. Our device will act as server in peripheral mode.  The cleint device should ask for 1 passkey which is ideependet for each of our device.

Could you please suggest which security mode we can approach?

Thanks,

Swapnil

[Vidar Berg]

Hi,

I suggest you take a look at the Glucose Application. It supports LESC passkey pairing. You can use this implementation as a reference if you want to enable the same for another application.

Also, you can add this to gap_init() if you want to set a static passkey:

    ble_opt_t ble_opt;
    uint8_t passkey[] = "123456";

    ble_opt.gap_opt.passkey.p_passkey = passkey;
    err_code = sd_ble_opt_set(BLE_GAP_OPT_PASSKEY, &ble_opt);
    APP_ERROR_CHECK(err_code);

Best regards,

Vidar

[Swapnil Karkare]

Hi,

Thanks for the response. 

Can you please confirm that after Pairing and connection in "Just Works", BLE provide encrypted and secure communication?

Also, Could you please provide documents which will refere above statement?

[Vidar Berg]

Yes, the link will be encrypted after you have received the PM_EVT_CONN_SEC_SUCCEEDED event from the peer manager. For more information on how the security works BLE I recommend you take a look at this guide here: https://www.bluetooth.com/bluetooth-resources/le-security-study-guide/