Reshuffle bitlocker recovery keys

Question

Hi

How do i reshuffle recovery keys every certain number of days to ensure that the keys are periodically changed and updated for security purposes.

Answer 1

Hi,

To reshuffle BitLocker recovery keys periodically, you can use a combination of PowerShell scripts and Task Scheduler in Windows.

Here’s a step-by-step guide to achieve this:

Step 1: Create a PowerShell Script to Rotate BitLocker Recovery Keys

1. Open a text editor and create a new PowerShell script file (e.g., RotateBitLockerKeys.ps1).
2. Add the following script to the file:

# Get all BitLocker-enabled drives
$bitlockerVolumes = Get-BitLockerVolume

foreach ($volume in $bitlockerVolumes) {
    # Backup the current recovery key to Active Directory (if applicable)
    Backup-BitLockerKeyProtector -MountPoint $volume.MountPoint -KeyProtectorId $volume.KeyProtector[0].KeyProtectorId

    # Add a new recovery key protector
    $newRecoveryKey = Add-BitLockerKeyProtector -MountPoint $volume.MountPoint -RecoveryPasswordProtector

    # Remove the old recovery key protector
    Remove-BitLockerKeyProtector -MountPoint $volume.MountPoint -KeyProtectorId $volume.KeyProtector[0].KeyProtectorId

    # Output the new recovery key
    Write-Output "New recovery key for $($volume.MountPoint): $($newRecoveryKey.RecoveryPassword)"
}

Step 2: Save the Script

Save the script with the name RotateBitLockerKeys.ps1.

Step 3: Create a Scheduled Task to Run the Script Periodically

1. Open Task Scheduler.
2. Click on Create Task in the right-hand pane.
3. In the General tab, provide a name for the task (e.g., "Rotate BitLocker Recovery Keys").
4. In the Triggers tab, click New to create a new trigger. Set the trigger to run at your desired interval (e.g., daily, weekly).
5. In the Actions tab, click New to create a new action. Set the action to start a program and enter the following in the Program/script field:

   powershell.exe

In the Add arguments (optional) field, enter the path to your script:

   -File "C:\Path\To\RotateBitLockerKeys.ps1"

1. In the Conditions and Settings tabs, configure any additional options as needed.
2. Click OK to create the task.

Step 4: Test the Script

Run the script manually to ensure it works correctly before relying on the scheduled task.