What encryption does Bitlocker use?

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What is the algorithm used by BitLocker in Windows 10? is AES with 128-bit key? I heard that it has 256-bit AES support, but I did not find any location that would allow me to choose that. I've even encrypted my external disk, but I do not know what algorithm is used.

    
asked by anonymous 30.04.2018 / 19:28

1 answer

0

BitLocker uses the XTS-AES (Advanced Encryption Standard) algorithm to encrypt the data. It was instroduced in Windows 10 (build 1511).

By default the key is 128 bits. It is possible to configure for 256 bits in the Windows registry, as follows:

HKLM \ SOFTWARE \ Policies \ Microsoft \ FVE

Operating System Drives: EncryptionMethodWithXtsOs

Fixed Data Drives: EncryptionMethodWithXtsFdv

Removable Data Drives: EncryptionMethodWithXtsRdv

Possible values:

  • AES-CBC 128bit - value 3
  • AES-CBC 128bit - value 4
  • AES-XTS 128bit - value 6
  • AES-XTS 256bit - value 7

More details here .

    
30.04.2018 / 19:49
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