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Migrate from Boxcryptor

Problem: Boxcryptor has been shut down. The encrypted data is still in OneDrive, Dropbox or on the NAS – but the program that opens it is gone.

Solution: Krywerk opens Boxcryptor folders as a drive using your key file and migrates them step by step to the modern, open format – while you keep working.

Result: All data is accessible again and ends up in a personal vault or team folder in the Cryptomator format, which detects any tampering. After that, the Boxcryptor folder is no longer needed.

Prerequisites

  • Your Boxcryptor key file (.bckey, the export from Boxcryptor) and your Boxcryptor password.
  • Krywerk is installed (Installation).
  • Space for a new, empty folder next to the Boxcryptor folder (in the same cloud storage).

Steps

  1. Settings › Boxcryptor (legacy) › “Choose key file …” and select the .bckey file. Unlock it with the Boxcryptor password on the overview.
  2. “+ Add” › “Personal vault or existing folder …”, choose the format Boxcryptor (legacy) and select the Boxcryptor folder. It appears as a “Boxcryptor (legacy)” drive – your files are readable again.
  3. On the drive, click “Switch to modern …”. Choose the target:
    • Password vault for personal data (own password), or
    • Team folder (key server) if several people need access.
  4. Choose a new, empty folder for the target and click “Start migration”. From now on, the drive shows the old and the new folder together: new and changed files go straight into the modern format.
  5. Transfer the rest: all at once with “Migrate all” or folder by folder via right-click (Explorer, Finder Quick Actions, Dolphin/Nautilus).
  6. Once all files have been migrated: “Finish migration”. The drive then only shows the new vault.

Migrating a Boxcryptor drive to the modern format

Only delete the old Boxcryptor folder after you have successfully opened the new vault on a second device. Keep the key file and password until then.

Without a drive: rescue individual files

For individual files, or if a drive is not possible, krywerk-recover decrypts directly:

krywerk-recover decrypt-tree "<Boxcryptor folder>" -o "<target folder>" --keyfile <file.bckey>

The password is prompted for without being displayed.

Next steps