ios - NSFileProtectionComplete and Core Data security in Xamarin -

There are a lot more information and examples to Kordata iOS applications and encrypt files using a key or protected. But I have trouble getting it. NET and Xamarin. How to use the keys to store small amounts of data but what about encryption and the protection of data / files? What app do I have that downloads large amounts of data from webservice and uses SQLite to local cache. Now I want to preserve the SQL file and encrypt the data in it. I want it to use Xamarin and SQLCipher do is not an option

I appreciate your tips and guidelines which should research / consider me direction.