Setting Up Email Encryption and Signing with Mozilla Thunderbird 3.1

Now, Test Encryption

  1. Compose a new message and enter the recipients email address.
  2. Click on "Options" then place a check mark near "Encrypt this Message", also ensure that "Digitally Sign" is enabled (it should be).  Or, click the down pointing arrow on the toolbar icon labeled "Security".

    Figure 12

  3. Enter a subject and content.
  4. Send the message.
  5. Open the message on the recipients computer.
  6. The message will now have both a wax sealed envelope icon and a pad lock icon.   The pad lock icon signifies that the message is encrypted.

    Figure 13

  7. If you were to look at the message's source, it will show the message body as gibberish.

All replies to this message will be encrypted by default. If you try to send an encrypted message to a recipient who you have not done the "handshake" with, Thunderbird will pop-up with an error.

Figure 14

This is why we did not enable encryption by default.

Message encryption only requires that both parties have each others public keys.  So long as this is true, the encryption will work across any email client that supports it.  The above example had both parties using Thunderbird, but the same results can be achieved if the recipient was using Mac Mail or Outlook.

PacyWorld Button
Powered by Pacy