Disk encryption hampers law enforcement
According to a research team, disk encryption is hampering law enforcement, and federal agencies are unable to get at data on an encrypted disk. Contrary to what we all see in the movies and on television, cracking an encrypted drive is not a simple thing; in fact, it’s so difficult that if someone has encrypted their hard drive, there is apparently little law enforcement (or anyone else) can do to read the data on the drive.
That’s another reason to have encrypted disk, especially on mobile device which contains more and more sensitive data. Ok, shameless plug here, get Renzhi Safe here, an encrypted virtual disk app for your Android device.