https://devzone.nordicsemi.com/f/nordic-q-a/9378/can-we-enable-the-aes-encryption-by-apiI am using nrf51822 custom board(no input output capability) i want to make communication between BLE and PC and i want encrypted link connection whether i have to initialize by API or it will automatically done in soft device when i am setting any ofen-USTelligent Community 13Thu, 01 Oct 2015 11:17:27 GMThttps://devzone.nordicsemi.com/thread/34626?ContentTypeID=1Thu, 01 Oct 2015 11:17:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c33f9c72-a327-427f-8cfe-aed5b3ed59a2Vidar Berg<p>Hi, encryption will be handled automatically by the <a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk51.v9.0.0/lib_device_manager.html?cp=4_1_0_3_1_2">device manager module</a> when a pairing request is issued from the central (implemted in all SDK BLE examples).</p> <p><a href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.s130.api.v1.0.0/group___b_l_e___g_a_p___p_e_r_i_p_h___b_o_n_d_i_n_g___j_w___m_s_c.html?cp=2_7_2_1_0_2_1_0_6">Just works</a> will be the default association model used when there are no IO capabilities or static passkey available. Again, this will be handled automatically be the device manager.</p> <p>BLE_GAP_CONN_SEC_MODE_SET_ENC_WITH_MITM() can be used to set the security requirement for each characteristic, hence force the central to pair in order to gain access.</p> <p>STK generation is randomly generated by the stack.</p><div style="clear:both;"></div>