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 se开发者_如何转开发e 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!
There are some FileProtection
options you can set when writing an NSData
to disk:
NSDataWritingFileProtectionComplete
NSDataWritingFileProtectionNone
)
as well as an extended attribute, NSFileProtectionKey
, you can set on pre-existing files on disk via NSFileManager
:
NSFileProtectionComplete
NSFileProtectionNone
The app delegate is also informed of when your application is (not) going to be able to access protected data:
-applicationProtectedDataDidBecomeAvailable:
-applicationProtectedDataWillBecomeUnavailable:
All the gory details of encrypting and securing the data are handled by the hardware and OS on your behalf. It's fire-and-forget protection that kicks in whenever the device locks.
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