What is BitLocker ?

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- February 26, 2018 at 1:08 pm #7201
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  What is BitLocker ?
- February 26, 2018 at 1:21 pm #7202
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  BitLocker is a Full Disk Encryption program included with Windows. Using BitLocker one can encrypt contents of the whole disk using a secret key. (What is Full Disk Encryption ?)
  
  BitLocker may use three mechanisms for encryption and decryption of the disk :
  
  (1) Transparent operation mode – It can use TPM or Trusted Platform Module hardware to provide transparent encryption and decryption. In this method, the secret key used in encryption is encrypted by the TPM chip. A user powers on the Windows machine as usual. But, during the boot, if boot files appear to be unmodified then the TPM chip releases the secret key to the OS loader code.
  
  (2) User authentication mode – In this mode, the user needs to provide some authentication to the pre-boot environment. He may need to provide a PIN or password for that purpose.
  
  (3) USB key mode – In this mode, the user needs to insert a USB drive that contains the startup key that is required to boot the OS. Please note that in this mode BIOS needs to be able to read a USB drive in the pre-OS environment.
  
  Encrypting File System may be used along with BitLocker to protect the operating system once it is running. You can find more information on Encrypting File System here: What is Encrypting File System and how does it work ?
  
  You may find the following links useful for further information :
  
  1. Windows BitLocker Drive Encryption Step-by-Step Guide
  2. What is a TPM, and Why Does Windows Need One For Disk Encryption?
  3. How to turn the TPM on or off
  4. How to Use the TPM: A Guide to Hardware-Based Endpoint Security
  - This reply was modified 8 years, 2 months ago by tupu.
  - This reply was modified 8 years, 2 months ago by tupu.
  - This reply was modified 8 years, 2 months ago by tupu.
  - This reply was modified 5 years, 9 months ago by tsb-moderator.
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