With OpenPGP Applet you can decrypt text that is encrypted using OpenPGP or verify text that is signed using OpenPGP.

  1. Select with the mouse the encrypted text that you want to decrypt or the signed text that you want to verify. Include the lines “-----BEGIN PGP MESSAGE-----“ and “-----END PGP MESSAGE-----”.

    To copy it into the clipboard, right-click on the selected text and choose Copy from the menu.

  2. If the text that you selected is encrypted, OpenPGP Applet now shows a padlock, meaning that the clipboard contains encrypted text:

    If the text that you selected is only signed, but not encrypted, OpenPGP Applet now shows a seal, meaning that the clipboard contains signed text:

  3. Click on OpenPGP Applet and select Decrypt/Verify Clipboard from the menu.

  4. If the text that you selected is only signed and the signature is valid, the GnuPG results window described in step 6 appears directly.

    If the text is signed and the signature is invalid, a GnuPG error message appears that mentions BAD signature from….

    If the text is encrypted with a passphrase, the Enter passphrase dialog box appears. Enter the passphrase that has been used to encrypt the text and click OK.

    If the text is encrypted using public-key cryptography, two different dialog boxes can appear.

    1. If the passphrase for the corresponding private key is not already cached in memory, a dialog box appears with the following message: You need a passphrase to unlock the secret key for user. Enter the passphrase for this secret key and click OK.

    2. If no secret key for which the text is encrypted is available in your keyring, a GnuPG error message appears that mentions decryption failed: secret key not available.

  5. If the passphrase provided in step 4 is incorrect, a GnuPG error message appears that mentions decryption failed: bad key.

  6. If the passphrase provided in step 4 is correct, or if the signature of the text is valid, or both, a GnuPG results window appears.

    The decrypted text appears in the Output of GnuPG text box.

    In the Other messages provided by GnuPG text box, the message Good signature from…, confirms that the signature of the text is valid.

To store your GnuPG keys and configuration across separate working sessions, you can activate the GnuPG persistence feature.