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2. Hardware-based full disk encryption - Wikipedia

   en.wikipedia.org/wiki/Hardware-based_full_disk...

   When a computer with a self-encrypting drive is put into sleep mode, the drive is powered down, but the encryption password is retained in memory so that the drive can be quickly resumed without requesting the password. An attacker can take advantage of this to gain easier physical access to the drive, for instance, by inserting extension cables.

3. Opal Storage Specification - Wikipedia

   en.wikipedia.org/wiki/Opal_Storage_Specification

   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.

4. Disk encryption - Wikipedia

   en.wikipedia.org/wiki/Disk_encryption

   Since disk encryption generally uses the same key for encrypting the whole drive, all of the data can be decrypted when the system runs. However, some disk encryption solutions use multiple keys for encrypting different volumes. If an attacker gains access to the computer at run-time, the attacker has access to all files.

5. Comparison of encrypted external drives - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_encrypted...

   Bootable: Whether (with the appropriate OS installed on the drive and supporting BIOS on a computer) the drive can be used to boot a computer. Encryption Type: Type of encryption used. Certification: Whether FIPS 140-2 or similar validation has been passed.

6. Comparison of disk encryption software - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_disk...

   Note that this does not imply that the encrypted disk can be used as the boot disk itself; refer to pre-boot authentication in the features comparison table. Partition: Whether individual disk partitions can be encrypted. File: Whether the encrypted container can be stored in a file (usually implemented as encrypted loop devices).

7. Disk encryption software - Wikipedia

   en.wikipedia.org/wiki/Disk_encryption_software

   Some disk encryption software (e.g., TrueCrypt or BestCrypt) provide features that generally cannot be accomplished with disk hardware encryption: the ability to mount "container" files as encrypted logical disks with their own file system; and encrypted logical "inner" volumes which are secretly hidden within the free space of the more obvious ...