title: iOS: Is it secure to store sensible user information in [NSUserDefaults standardUserDefaults]?
body: <p>I understand that, besides some general settings, an iOS app can only see the contents in the <code>[NSUserDefaults standardUserDefaults]</code> that itself created. I guess the OS is looking at the app's identifier to ensure this, right?
  What I want to know is if there is any way another applications could gather information that my app stored in the user defaults.</p>