Popular open-source encryption software TrueCrypt has shutdown due to "unfixed security issues" and is now redirecting their SourceForge page to an official announcement of their closure and to a step-by-step guide on how to migrate from TrueCrypt to Microsoft's BitLocker solution. The announcement on their site reads the following:
WARNING: Using TrueCrypt is not secure as it may contain unfixed security issues
This page exists only to help migrate existing data encrypted by TrueCrypt.
The development of TrueCrypt was ended in 5/2014 after Microsoft terminated support of Windows XP. Windows 8/7/Vista and later offer integrated support for encrypted disks and virtual disk images. Such integrated support is also available on other platforms (click here for more information). You should migrate any data encrypted by TrueCrypt to encrypted disks or virtual disk images supported on your platform.
You should download TrueCrypt only if you are migrating data encrypted by TrueCrypt.
Truecrypt is widely considered as the go-to software for data encryption and has just recently got the all-clear in the first phase of an independent security audit performed last month. The auditing firm “found no evidence of backdoors or intentional flaws”.
Initial rumors suggested that their page had gotten hacked and defaced, though as time passed it had become clear that TrueCrypt had genuinely decided to close their doors. The webpage now offers a new decrypt-only version of TrueCrypt (version 7.2) for Windows, Mac OS X and Linux.
We suggest going through the procedure of migrating to a different encryption tool, specifically BitLocker as specified here. BitLocker comes integrated with Windows Operating systems and is also available for other platforms.