ElcomSoft have released their iOS forensic toolkit which they say can decrypt the data that iOS encrypts on the device. I am unsure how comprehensive this is, and so it is uncertain if recovery of deleted files is at all possible. Maybe someone could clarify this for me?
It is a software solution which looks like it brute-forces it’s way to find the encryption key. I still think it would be very interesting into finding a way to recover the encryption key from the encryption chip itself.