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BitLocker is a logical volume encryption system. (A volume spans part of a hard disk drive, the whole drive or more than one drive.) When enabled, TPM and BitLocker can ensure the integrity of the trusted boot path (e.g. BIOS and boot sector), in order to prevent most offline physical attacks and boot sector malware. [38]
Option to enable/disable support for the TRIM command for both system and non-system drives was added in version 1.22. [15] Erasing the system encryption keys from RAM during shutdown/reboot helps mitigate some cold boot attacks, added in version 1.24. [15] RAM encryption for keys and passwords on 64-bit systems was added in version 1.24. [15]
FileVault uses the user's login password as the encryption passphrase. It uses the XTS-AES mode of AES with 128 bit blocks and a 256 bit key to encrypt the disk, as recommended by NIST. [11] [12] Only unlock-enabled users can start or unlock the drive. Once unlocked, other users may also use the computer until it is shut down.
McAfee Drive Encryption (SafeBoot) McAfee, LLC: 2007 [24] Proprietary: Yes n-Crypt Pro n-Trance Security Ltd 2005 Proprietary: Yes PGPDisk: PGP Corporation (acquired by Symantec in 2010) 1998-09-01 [25] Proprietary: Yes Private Disk: Dekart 1993 [26] Proprietary: Yes ProxyCrypt v77 2013 Open source: Yes R-Crypto R-Tools Technology Inc 2008 ...
HDDs have become a commodity so SED allow drive manufacturers to maintain revenue. [3] Older technologies include the proprietary Seagate DriveTrust, and the older, and less secure, PATA Security command standard shipped by all drive makers including Western Digital. Enterprise SAS versions of the TCG standard are called "TCG Enterprise" drives.
Disk encryption usually includes all aspects of the disk, including directories, so that an adversary cannot determine content, name or size of any file. It is well suited to portable devices such as laptop computers and thumb drives which are particularly susceptible to being lost or stolen. If used properly, someone finding a lost device ...
The Opal Storage Specification is a set of specifications for features of data storage devices (such as hard disk drives and solid state drives) that enhance their security. For example, it defines a way of encrypting the stored data so that an unauthorized person who gains possession of the device cannot see the data.
The cryptsetup command-line interface, by default, does not write any headers to the encrypted volume, and hence only provides the bare essentials: encryption settings have to be provided every time the disk is mounted (although usually employed with automated scripts), and only one key can be used per volume; the symmetric encryption key is directly derived from the supplied passphrase.