Core Data and Encryption

How core data can be encrypted using the most robust encryption mechanism AES 256? Is there any other way Apple provides security for Coredata apart from FileProtectionType which is dependent on device's passcode? We basically need to encrypt the Coredata DB and it should be accessible through app only. The prefferable encryption mechaism we are lookig for is AES 256.

Core Data and Encryption
 
 
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