Difference between pages "International Business Machines Corporation" and "BitLocker Disk Encryption"

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'''BitLocker Disk Encryption''' (BDE) is [[Full Volume Encryption]] solution by [[Microsoft]] first included with the Enterprise and Ultimate editions of [[Windows|Windows Vista]]. It is also present in [[Windows 7]] along with a system for encrypting removable storage media devices, like [[USB]], which is called [[BitLocker To Go]].
  
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IBM is a computer hardware and software vendor.
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Volumes encrypted with BitLocker will have a different signature than the standard [[NTFS]] header. Instead, they have in their volume header (first sector): <tt>2D 46 56 45 2D 46 53 2D</tt> or, in ASCII, <tt>-FVE-FS-</tt>.
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Volumes encrypted with BitLocker To Go will have a hybrid encrypted volume, meaning that part of the volume is unencrypted and contains applications to unlock the volume and the other part of the volume is encypted. These volumes can be identified by the BitLocker GUID/UUID: 4967d63b-2e29-4ad8-8399-f6a339e3d00.
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The actual data on the encrypted volume is protected with either 128-bit or 256-bit [[AES]] and optionally diffused using an algorithm called Elephant. The key used to do the encryption, the Full Volume Encryption Key (FVEK) and/or TWEAK key, is stored in the BitLocker metadata on the protected volume. The FVEK and/or TWEAK keys are encrypted using another key, namely the Volume Master Key (VMK). Several copies of the VMK are also stored in the metadata. Each copy of the VMK is encrypted using another key, also know as key-protector key. Some of the key-protectors are:
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* TPM (Trusted Platform Module)
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* recovery password
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* start-up key
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* clear key; this key-protector provides no protection
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* user password
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BitLocker has support for partial encrypted volumes.
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== manage-bde ==
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To view the BitLocker Drive Encryption (BDE) status on a running Windows system:
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<pre>
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manage-bde.exe -status
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</pre>
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To obtain the recovery password for volume C:
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<pre>
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manage-bde.exe -protectors -get C: -Type recoverypassword
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</pre>
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Or just obtain the all “protectors” for volume C:
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<pre>
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manage-bde.exe -protectors -get C:
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</pre>
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== See Also ==
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* [[BitLocker To Go]]
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* [[BitLocker:_how_to_image]]
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* [[Defeating Whole Disk Encryption]]
  
 
== External Links ==
 
== External Links ==
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* [http://www.ibm.com IBM: International Business Machines]
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* [http://en.wikipedia.org/wiki/IBM Wikipedia: IBM]
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* [http://www.nvlabs.in/archives/1-NVbit-Accessing-Bitlocker-volumes-from-linux.html NVbit : Accessing Bitlocker volumes from linux], 2008
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* Jesse D. Kornblum, [http://jessekornblum.com/publications/di09.html Implementing BitLocker for Forensic Analysis], ''Digital Investigation'', 2009
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* [http://en.wikipedia.org/wiki/BitLocker_Drive_Encryption Wikipedia entry on BitLocker]
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* [http://technet2.microsoft.com/WindowsVista/en/library/c61f2a12-8ae6-4957-b031-97b4d762cf311033.mspx?mfr=true Microsoft's Step by Step Guide]
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* [http://technet.microsoft.com/en-us/windowsvista/aa906017.aspx Microsoft Technical Overview]
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* [http://www.microsoft.com/whdc/system/platform/hwsecurity/BitLockerFAQ.mspx Microsoft FAQ]
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* [http://www.microsoft.com/downloads/details.aspx?FamilyID=131dae03-39ae-48be-a8d6-8b0034c92555&DisplayLang=en Microsoft Description of the Encryption Algorithm]
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* [http://secude.com/htm/801/en/White_Paper%3A_Cold_Boot_Attacks.htm Cold Boot Attacks, Full Disk Encryption, and BitLocker]
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* [http://code.google.com/p/libbde/ Project to read BitLocker encrypted volumes]
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[[Category:Disk encryption]]
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[[Category:Windows]]

Revision as of 01:38, 8 March 2012

BitLocker Disk Encryption (BDE) is Full Volume Encryption solution by Microsoft first included with the Enterprise and Ultimate editions of Windows Vista. It is also present in Windows 7 along with a system for encrypting removable storage media devices, like USB, which is called BitLocker To Go.

Volumes encrypted with BitLocker will have a different signature than the standard NTFS header. Instead, they have in their volume header (first sector): 2D 46 56 45 2D 46 53 2D or, in ASCII, -FVE-FS-.

Volumes encrypted with BitLocker To Go will have a hybrid encrypted volume, meaning that part of the volume is unencrypted and contains applications to unlock the volume and the other part of the volume is encypted. These volumes can be identified by the BitLocker GUID/UUID: 4967d63b-2e29-4ad8-8399-f6a339e3d00.

The actual data on the encrypted volume is protected with either 128-bit or 256-bit AES and optionally diffused using an algorithm called Elephant. The key used to do the encryption, the Full Volume Encryption Key (FVEK) and/or TWEAK key, is stored in the BitLocker metadata on the protected volume. The FVEK and/or TWEAK keys are encrypted using another key, namely the Volume Master Key (VMK). Several copies of the VMK are also stored in the metadata. Each copy of the VMK is encrypted using another key, also know as key-protector key. Some of the key-protectors are:

  • TPM (Trusted Platform Module)
  • recovery password
  • start-up key
  • clear key; this key-protector provides no protection
  • user password

BitLocker has support for partial encrypted volumes.

manage-bde

To view the BitLocker Drive Encryption (BDE) status on a running Windows system: 

manage-bde.exe -status

To obtain the recovery password for volume C: 

manage-bde.exe -protectors -get C: -Type recoverypassword

Or just obtain the all “protectors” for volume C: 

manage-bde.exe -protectors -get C:

See Also

External Links

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