The best-kept secret in hard drive encryption - #hdd
Credit:
kevincollins123 (Flickr)
An
SED is a self-encrypting hard drive with a circuit built into the disk
drive controller chip that encrypts all data to the magnetic media and
decrypts all the data from the media automatically. All SEDs encrypt all
the time from the factory onwards, performing like any other hard
drive, with the encryption being completely transparent or invisible to
the user.
To protect the data from theft, the user provides a password. This password is used by the drive to encrypt or decrypt the media encryption key. In this way even the media encryption key cannot be known without knowing the password.
Very strong passwords are permitted by the Trusted Computing Group specification for SEDs of up to 32 bytes. With such a password, it is practically impossible for a would-be data thief to recover the media encryption key and access data on the hard drive. In January 2009, the Trusted Computing Group (TCG) published final specifications for SEDs that are widely supported by PC, server drive and application providers. In March 2009, hard drive suppliers started shipping SEDs based on the TCG's specifications.
Source : Here
To protect the data from theft, the user provides a password. This password is used by the drive to encrypt or decrypt the media encryption key. In this way even the media encryption key cannot be known without knowing the password.
Very strong passwords are permitted by the Trusted Computing Group specification for SEDs of up to 32 bytes. With such a password, it is practically impossible for a would-be data thief to recover the media encryption key and access data on the hard drive. In January 2009, the Trusted Computing Group (TCG) published final specifications for SEDs that are widely supported by PC, server drive and application providers. In March 2009, hard drive suppliers started shipping SEDs based on the TCG's specifications.
Source : Here
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