BitLocker Drive Encryption

Windows BitLocker Drive Encryption is a new security feature that provides better data protection for your computer, by encrypting all data stored on the Windows operating system volume.

BitLocker can use a TPM to verify the integrity of early boot components and boot configuration data. This helps ensure that BitLocker makes the encrypted drive accessible only if those components have not been tampered with and the encrypted drive is located in the original computer.

BitLocker helps ensure the integrity of the startup process by taking the following actions:

  • Provide a method to check that early boot file integrity has been maintained, and help ensure that there has been no adversarial modification of those files, such as with boot sector viruses or rootkits.
  • Enhance protection to mitigate offline software-based attacks. Any alternative software that might start the system does not have access to the decryption keys for the Windows operating system drive.
  • Lock the system when it is tampered with. If any monitored files have been tampered with, the system does not start. This alerts the user to the tampering, because the system fails to start as usual. In the event that system lockout occurs, BitLocker offers a simple recovery process.

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