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WinMagic SecureDoc

SecureDoc Enterprise Server

Windows, Linux

Yes

None

http://www.utexas.edu/its/encrypt/

Microsoft Bitlocker ¹

Active Directory (in some cases), Stache

Windows Vista and newer

Yes

None

Windows 7 BitLocker Executive Overview

BitLocker Encryption Overview

Apple FileVault 2 ²

Stache

Mac OS X 10.7+

Partition

None

OS X: About FileVault 2

Apple FileVault ³

Stache

Mac OS X 10.3-10.6

No

None

Mac OS X 10.6: Encrypting your home folder with FileVault

Secure virtual memory must also be enabled.

Linux Unified Key Setup (LUKS) Encryption ⁴

Stache

Redhat 6+,
Fedora 9+,
Ubuntu 6+ ⁵,
Ubuntu 12.10+

Partition

None

LUKS Disk Encryption

TrueCrypt v7.1a with pre-boot authentication ^{6 7}

Stache

Windows XP 7/Vista/ 7XP

Windows only

None

No longer approved for new deployments after May 2014. ⁷

Self-Encrypting Drive (SED) ^{8 9 10}

SecureDoc Enterprise Server, Stache

Windows, Mac OS X, Linux

Yes

Depends on size, storage technology, and vendor.

The SED chosen must be compliant with the OPAL specification.  Check with the vendor to ensure compliance.