Implementing and Testing iOS data protection

Question

Just saw the Session 209 - Securing Application Data from de 2010 WWDC.

The keynote explains a lot of things, including the way you can set data protection attribute

Answer 1

You can use the iExplorer app to detect if your files are encrypted. iExplorer lets you browse the filesystem of your iPhone/iPad, and open the file (of course your device must be plugged into your Mac).

When the device is locked, the files can't be read correctly.