Starting with iTunes 8.2 and iPhoneOS 3.0 it became possible to protect iTunes backups with a password. After you specify protection password, no backup data leaves or enters device unencrypted. The data is encrypted on the device, transmitted encrypted and saved encrypted on the hard disk.
If you need password recovery of password-protected iPhone and iPod touch backups made with iTunes, you're in luck because now there's an app for that! Elcomsoft released the first public beta of Elcomsoft iPhone Password Breaker and a free version is available for download.
Given a password-protected backup, Elcomsoft iPhone Password Breaker can run various password recovery attacks, trying thousands passwords per second. It supports multi-core CPUs, extended CPU instructions, and acceleration using GPU cards (only NVIDIA for the moment, ATI and friends coming in a month or two).
The software does not use Apple iTunes, and does not need to have it installed.
Advanced iPhone Password Breaker supports an advanced dictionary attack with customizable permutations. Since the majority of users choose meaningful, dictionary-based passwords that are easier for them to remember, this tool is able to recover such passwords and their variations quickly and efficiently no matter which language they are.
The software increases the speed of password recovery when one or more supported video cards are present. GPU acceleration reduces the time required to recover iPhone/iPod backup passwords by orders of magnitude. The latest generation of ElcomSoft GPU acceleration technology supports unlimited numbers of ATI or NVIDIA boards such as NVIDIA GeForce 8, 9, and 200 series and ATI RADEON 4800 and 5000 series.
Elcomsoft Advanced iPhone Password Breaker supports Windows XP, Windows Server 2003, Windows Server 2008, Windows Vista or Windows 7 with x32 and x64 architectures. Password-protected backups to iPhone 2G, 3G, 3GS, and iPod Touch 1st, 2nd, and 3rd Gen devices are supported.