![]() WinMagic SecureDoc already supports supported Macs until October 2013, but a version for OS X 10.9 was never released. This is also an advantage as it does not require hardware or OS support so even Macs could use them: This includes WinMagic SecureDoc (for Windows and Mac), Wave Systems Embassy Security Center (for Windows only) and several others, but also BitLocker/eDrive in Windows 8 (however, this requires IEEE-1667 support as well). The downside of course is that you need a piece of software to use Opal. They can also have multiple passwords for multiple users and they can be configured entirely from within the OS, which also allows for central management in enterprise environments. ![]() ![]() ![]() These special boot loaders can do much more than a BIOS: for example, they can provide means for key reset and they can talk to a server on the network. The advantage of Opal is that it divides the drive into a small read-only segment (technically not a partition) with a special boot loader (which prompts you for the encryption password and passes it to the drive) and the encrypted segment which contains your traditional OS and data partitions. Many older SSDs already support AES encryption and use the ATA password for this, which is settable in the BIOS. Recently, a few SSD models have been introduced that support Full-Disk Encryption per the TCG Opal standard.
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