title: BLE Out of band (OOB) pairing on iOS (13+)
body: <p>I'm working on an iOS application (for iOS 13+), that should use the most secure BLE pairing method, Out of Band pairing (OOB) (which usually uses an NFC tag for BLE address/temporary key (TK) storage).</p>
  
  <p>Unfortunately, either my Google skills suck, or there is literally no useful information on Google for OOB pairing in iOS..</p>
  
  <p>From my understanding, Apple is already using some OOB technique to pair with the Apple watch (through an image rather than NFC, with fallback to passkey).</p>
  
  <p>During my Google research I've found one single link to StackOverflow, 
  <a href="https://stackoverflow.com/questions/32385342/bluetooth-out-of-band-oob-pairing-on-ios">Bluetooth “out of band” (OOB) pairing on iOS?</a>,
  which raises the same question, but it's from September 2015, so the answer there is (hopefully) outdated!</p>
  
  <p>Also, having had a look at CoreBluetooth API, it seems like there is no information in there on OOB pairing..</p>
  
  <p><strong>> Does anyone have more (up-to-date) information on this topic?</strong> </p>
  
  <p>Any link/clue/explanation is much appreciated!</p>
  
  <p>(I can't believe really, that this hasn't been implemented in iOS as of today..)</p>