German researchers have devised five methods that determined attackers can
use to bypass hard-drive encryption in recent versions of Microsoft operating
The methods, laid out by a research team from the Frauenhofer Institute for
Security Information Technology, can be used to access files protected by
BitLocker drive encryption contained in Windows Server 2008 and pricier versions
of Windows Vista and Windows 7. BitLocker prevents files or entire volumes from
being accessed without a user password being entered first.