https://devzone.nordicsemi.com/f/nordic-q-a/25283/mimic-mac-addressHello, It doesn&#39;t seem possible to mimic a IEEE public BLE MAC address using the BLE stack provided by Noridc. But how easy is it for others to roll their own BLE stack that does allow them to mimic MAC addresses that&#39;s been assigned to other modulesen-USTelligent Community 13Tue, 19 Sep 2017 03:31:21 GMThttps://devzone.nordicsemi.com/thread/99627?ContentTypeID=1Tue, 19 Sep 2017 03:31:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:db649852-0d1a-419f-8e0b-a2cc91f5a20bBLE_lp<p>Thanks for the correction. I had thought that the set address was used only for random static address with the &quot;11&quot; on the MSB. It looks like I have to</p> <p>ble_gap_addr.addr_type = BLE_GAP_ADDR_TYPE_PUBLIC;</p> <p>before using the set address command. Thanks!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/99626?ContentTypeID=1Mon, 18 Sep 2017 20:59:26 GMT137ad170-7792-4731-bb38-c0d22fbe4515:10f29f4e-d81d-4627-b8e2-071307d24942endnode<p>Why do you think so? You can set full 46-bit MAC on nRF5x chips, <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s132.api.v5.0.0/group___b_l_e___g_a_p___f_u_n_c_t_i_o_n_s.html#gaef69dc212534adf4b78d211edce2267b">with</a> or <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/radio.html?cp=2_1_0_22_3#concept_mdy_kcj_4r">without</a> Nordic BLE stack... So anything based on MAC in BLE has very little to do with security, replay/relay attacks are trivial.</p><div style="clear:both;"></div>