Best method of encrypting local data on iPhone application
I have an application that stores data locally on the iPhone. 
I want to encrypt data so i am confused which method should i use.

NSFileManager (NSFileProtectionKey), CoreData (NSFileProtectionKey), NSData (NSDataWritingOptions) are the options or is there some other method as well. 
Please suggest me something

Thanks
Best method of encrypting local data on iPhone application
===

I have an application that stores data locally on the iPhone. 
I want to encrypt data so i am confused which method should i use.

NSFileManager (NSFileProtectionKey), CoreData (NSFileProtectionKey), NSData (NSDataWritingOptions) are the options or is there some other method as well. 
Please suggest me something

Thanks