Difference between pages "Fast Thunder" and "BitLocker Disk Encryption"

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'''Fast Thunder''' (aka Xunlei) is a [[Download manager|download manager]] developed by Thunder Networking Technologies.
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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|Windows 7]] along with a system for encrypting removable storage media devices, like [[USB]], which is called BitLocker To Go. Unlike previous versions of BitLocker, BitLocker To Go allows the user to protect volumes with a password or smart card.
  
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== BitLocker ==
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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>.
  
== SuperDownload database ==
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These volumes can be identified by the BitLocker GUID/UUID: 4967d63b-2e29-4ad8-8399-f6a339e3d00.
The '''SuperDownload database''' can be found at:
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On Windows
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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:
<pre>
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* TPM (Trusted Platform Module)
C:\Program Files\Thunder Network\Thunder\data\SdInfoDb.dat
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* Smart card
</pre>
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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
  
This file uses the [[SQLite database format]].
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BitLocker has support for partial encrypted volumes.
  
The timestamp:
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== BitLocker To Go ==
* SuperDownloadInfo.ContentDownloadTime is stored as BIGINT and contains a POSIX timestamp
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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 encrypted. The "discovery drive" volume contains BitLocker To Go Reader to read from encrypted volumes on versions of Microsoft [[Windows]] without BitLocker support.
* SuperDownloadResource.DownloadTime is stored as BIGINT and contains '''presumably''' a POSIX timestamp
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== Task database ==
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== manage-bde ==
The '''Task database''' can be found at:
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To view the BitLocker Drive Encryption (BDE) status on a running Windows system:
 
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On Windows
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<pre>
 
<pre>
C:\Program Files\Thunder Network\Thunder\Profiles\TaskDb.dat
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manage-bde.exe -status
 
</pre>
 
</pre>
  
The timestamp:
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To obtain the recovery password for volume C:
* TaskBase.CreationTime is stored as BIGINT and contains a POSIX timestamp shifted 24-bits to the left, e.g.
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<pre>
 
<pre>
printf "0x%x\n" 22090158425767936
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manage-bde.exe -protectors -get C: -Type recoverypassword
0x4e7ae1ce000000
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</pre>
  
date -d @$(( 22029112998625280 >> 24 ))
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Or just obtain the all “protectors” for volume C:
Thu Aug 11 06:37:35 CEST 2011
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<pre>
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manage-bde.exe -protectors -get C:
 
</pre>
 
</pre>
  
 
== See Also ==
 
== See Also ==
 
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* [[BitLocker:_how_to_image]]
* [[SQLite database format]]
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* [[Defeating Whole Disk Encryption]]
  
 
== External Links ==
 
== External Links ==
* [http://en.wikipedia.org/wiki/Xunlei Wikipedia article on Fast Thunder (Xunlei)]
 
  
[[Category:Applications]]
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* [http://www.nvlabs.in/archives/1-NVbit-Accessing-Bitlocker-volumes-from-linux.html NVbit : Accessing Bitlocker volumes from linux], 2008
[[Category:Download Managers]]
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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://technet.microsoft.com/en-us/magazine/2009.05.win7.aspx An Introduction to Security in Windows 7]
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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://technet.microsoft.com/en-us/library/hh831412.aspx What's New in BitLocker] in Windows 8
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== Tools ==
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* [http://www.hsc.fr/ressources/outils/dislocker/ dislocker]
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* [[libbde]]
 +
 
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[[Category:Disk encryption]]
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[[Category:Windows]]

Revision as of 01:00, 27 June 2013

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. Unlike previous versions of BitLocker, BitLocker To Go allows the user to protect volumes with a password or smart card.

BitLocker

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-.

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)
  • Smart card
  • recovery password
  • start-up key
  • clear key; this key-protector provides no protection
  • user password

BitLocker has support for partial encrypted volumes.

BitLocker To Go

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 encrypted. The "discovery drive" volume contains BitLocker To Go Reader to read from encrypted volumes on versions of Microsoft Windows without BitLocker support.

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

Tools