Windows与Linux加密磁盘胁迫式密钥清除方案技术问询

Great question—implementing a duress feature for encrypted disks is a critical privacy/security need, and you’re already on the right track with LUKS on Linux. Let’s break down the Windows side of things clearly:

1. Third-Party Encryption Tools with Key Slot Support #

VeraCrypt is the closest equivalent to LUKS on Windows, with robust key slot management tailor-made for duress scenarios:

• It supports up to 5 independent key slots per encrypted volume, so you can design triggers that target specific slots.
• For a "panic" duress action, you can set up a script that clears your primary key slot(s) (making the main encrypted data unrecoverable) when triggered—for example, by entering a pre-defined duress password.
• Use this admin command to delete a specific key slot:

  veracrypt /deletekey "C:\YourEncryptedVolume.vc" /slot 1
  

  Replace the volume path and slot number with your setup details. You can bind this command to a hidden keystroke or a fake login prompt that executes it automatically.

2. BitLocker (Windows Native) Workarounds #

BitLocker doesn’t offer direct key slot clearing like LUKS, but you can replicate duress functionality by targeting its key protectors:

• Remove TPM Protection: If your volume uses TPM-only auto-unlock, run this admin command to invalidate the TPM-stored key:

  manage-bde -protectors -delete C: -type tpm
  

  This forces BitLocker to demand a recovery key on next boot—without that key, an attacker can’t decrypt the drive.
• Full Protector Clear: To eliminate all access paths (except recovery keys), add this command to delete password-based protectors too:

  manage-bde -protectors -delete C: -type password
  

  You can tie this to a duress trigger like a specific "fake" password input.

3. TPM Clear Methods (For Total Key Invalidation) #

If your encryption relies on TPM-stored keys (BitLocker, some third-party tools), clearing the TPM will wipe all stored credentials, rendering the drive inaccessible without recovery data:

• PowerShell (Admin):

  Clear-Tpm
  

  This resets the TPM to factory defaults, erasing all keys and policies instantly.
• Graphical Interface: Open tpm.msc, right-click the TPM node, and select "Clear TPM". Note: Some BIOS/UEFI setups require physical confirmation (like pressing a button) to complete this action.

Quick Caveats #

• Always test these workflows in a non-production environment first—accidental key clearing leads to permanent data loss.
• For VeraCrypt, consider its hidden volume feature as an alternative duress mechanism: instead of clearing keys, enter a duress password to unlock a decoy volume while hiding your sensitive data entirely.

内容的提问来源于stack exchange，提问作者Ruhgster