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Whole disk: Whether the whole physical disk or logical volume can be encrypted, including the partition tables and master boot record. 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.
Pre-boot authentication can by performed by an add-on of the operating system like Linux Initial ramdisk or Microsoft's boot software of the system partition (or boot partition) or by a variety of full disk encryption (FDE) vendors that can be installed separately to the operating system. Legacy FDE systems tended to rely upon PBA as their ...
In February 2008, a group of security researchers published details of a so-called "cold boot attack" that allows full disk encryption systems such as BitLocker to be compromised by booting the machine from removable media, such as a USB drive, into another operating system, then dumping the contents of pre-boot memory. [45]
Users concerned about tools like Kon-Boot should use disk encryption [23] (FileVault, Bitlocker, Veracrypt etc.) software as Kon-Boot is not able to bypass disk encryption. [24] BIOS password and enabled SecureBoot [25] [26] feature is also a good prevention measure. However Kon-Boot since version 3.5 is able to bypass SecureBoot feature. [27 ...
FileVault was introduced with Mac OS X 10.3 Panther, [1] and could only be applied to a user's home directory, not the startup volume. The operating system uses an encrypted sparse disk image (a large single file) to present a volume for the home directory.
Authentication on power up of the drive must still take place within the CPU via either a software pre-boot authentication environment (i.e., with a software-based full disk encryption component - hybrid full disk encryption) or with a BIOS password. In additions, some SEDs support IEEE 1667 standard. [2]
One issue to address in full disk encryption is that the blocks where the operating system is stored must be decrypted before the OS can boot, meaning that the key has to be available before there is a user interface to ask for a password. Most Full Disk Encryption solutions utilize Pre-Boot Authentication by loading a small, highly secure ...
This key is itself encrypted in some way using a password or pass-phrase known (ideally) only to the user. Thereafter, in order to access the disk's data, the user must supply the password to make the key available to the software. This must be done sometime after each operating system start-up before the encrypted data can be used.