What encryption does Bitlocker use?

Asked

Viewed 234 times

2

What is the algorithm used by Bitlocker in Windows 10? is AES 128-bit key? I’ve heard that it has AES-256 bit support, but I couldn’t find any place that would allow me to choose that. I’ve even encrypted my external drive, but I don’t know which algorithm is used.

windows-10

1 answer

0

Bitlocker uses the XTS-AES (Advanced Encryption Standard) algorithm to encrypt the data. It was built on Windows 10 (build 1511).

By default the key is 128 bit. It is possible to set to 256 bit in the Windows registry as per instructions below:

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.

Browser other questions tagged windows-10

You are not signed in. Login or sign up in order to post.