https://devzone.nordicsemi.com/f/nordic-q-a/37910/ble-security-methodHi, I&#39;m using NUS service on nRF51822 with SDK 12.3 . I want to secure the communication between the nRF and the mobile application. So, I want to know the different method of BLE security and some example of how to use each method. thanksen-USTelligent Community 13Thu, 30 Aug 2018 08:01:14 GMThttps://devzone.nordicsemi.com/thread/146429?ContentTypeID=1Thu, 30 Aug 2018 08:01:14 GMT137ad170-7792-4731-bb38-c0d22fbe4515:33e2a169-8cfe-4119-b5de-7892e6714b6drun_ar<p>Hi,</p> <p>You can find our Bluetooth low energy examples in our sdk. You can find our SDK documentation here <span><a title="nRF5 SDK v15.1.0" href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk/keydef/PLUGINS_ROOT/com.nordic.infocenter.sdk5.v15.1.0/index.html?cp=4_0_0">nRF5 SDK v15.1.0</a></span>. Bluetooth example documentation here: <span><a title="Bluetooth low energy examples" href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.1.0/examples_ble.html?cp=4_0_0_4_1">Bluetooth low energy examples</a></span>. As an example our ble_app_hids_keyboard example uses legacy pairing and a whitlist. LESC is supported by the following examples: ble_app_hrs, ble_app_hrs_c, and ble_app_gls as well as our <span><a title="Experimental: LE Secure Connections Multirole Example" href="http://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.1.0/ble_sdk_app_multirole_lesc.html?cp=4_0_0_4_1_1_3">Experimental: LE Secure Connections Multirole Example</a></span></p><div style="clear:both;"></div>