https://devzone.nordicsemi.com/f/nordic-q-a/11977/how-to-pair-the-peripheral-with-only-specific-ios-appHi, We are using nRF51822 as a peripheral device. We have an IOS app running in a smart phone or tablet. Our requirement is that we need to pair the peripheral only with our IOS app. I have two questions. nRF51822 will advertise its address. Is iten-USTelligent Community 13Fri, 19 Feb 2016 08:25:21 GMThttps://devzone.nordicsemi.com/thread/45337?ContentTypeID=1Fri, 19 Feb 2016 08:25:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7eb2314e-443b-4934-a112-226630e4a4earun_ar<p>Pairing is handled by core bluetooth, not in the application. This means a peripheral will be available to other applications as well. The advertisement packet is visible to all scanners. To limit the usability of your peripheral for other applications you can use custom services. In addition you should add application level encryption to your characteristics values.</p><div style="clear:both;"></div>