title: Privately sharing data between iOS apps that have different team IDs
body: <p>How can I privately share data between two apps on the same device that have different team IDs?  We used to do this via the pasteboard, but with iOS7 to use app-specific pasteboards they now have to have the same team id.</p>
  
  <p>The problem we are trying to solve is the unlocking of features in one app if the user has purchased another app. We'd like this to happen quietly in the background (hence originally using app-specific pasteboards) but having some security to prevent users from spoofing the process and unlocking features.</p>
  
  <p>One approach we are investigating is to use a system pasteboard but to encrypt the data with a device specific key.  As long as both apps use the same algorithm to generate the key this should work, but he problem then becomes how to generate an app specific key.</p>
  
  <p>Any advice/guidance on the best way of enabling this sort of feature unlocking scheme would be very helpful. </p>