I need to provide two means for securing data within my application. First is using the Operating System sandboxing model (I am talking about Mobile Phones OS) and the second using the OpenSSL AES encryption algorithm in addition to the sandbox model.
The best is to allow the application user to configure data to be critical or not. But I am wondering if anyone is aware of a survey or anything similar that categorize data in terms or critical or not critical. So far I am considering two categories in order not to make it so complex, but if there are some standard classification I would be a taker as well.