If you Google "iphone data protection apis" you'll see a zillion hits based on press releases.
If you check out http://support.apple.com/kb/HT4175 you can see Apple making the indication directly.
Where are/what are these APIs? I've used the old crypto APIs before iOS4, so they're not those. These APIs are supposed to give MDM (Mobile Device Management)-type capability for 3rd-party apps.
TIA!
See Question&Answers more detail:os