Microsoft BitLocker

    BitLocker is a full disk encryption feature included with the Ultimate and Enterprise editions of Windows Vista and Windows 7, the Pro and Enterprise editions of Windows 8and Windows 8.1, and Windows Server 2008 and later. It is designed to protect data by providing encryption for entire volumes. By default it uses the AES encryption algorithm in cipher block chaining (CBC) mode with a 128-bit or 256-bit key, combined with the Elephant diffuser for additional disk encryption-specific security not provided by AES. CBC is not used over the whole disk, only for each individual disk sector.