Read a CRES-encrypted message received at your Gmail at IU account

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When an email message is encrypted by the Cisco Registered Envelope Service (CRES), it is encrypted for the recipient's email address alone. If you have a Gmail at IU account, messages sent to you at may automatically be forwarded to you at This means that the address for which the message is encrypted is not necessarily the address in the message's "To:" line. You will need to examine and possibly adjust the address on an incoming CRES-encrypted message in order to read it.

Recipients of encrypted messages will receive an email message stating "You have received a secure message", with an attachment named securedoc.html or securedoc_xxxxxxxxxxxxxxx.html (for example, securedoc_20121027T114704.html). This securedoc file is the Cisco Registered Envelope.

Before you begin

The instructions here address the situation when an Indiana University student receives an encrypted message sent from an IU email system (for example, from a faculty or staff member's Exchange account). Other situations might require different solutions, including:

  • You receive an encrypted message from a non-IU source, such as an IU Health hospital; these messages will have been encrypted by that source's systems.
  • You receive an encrypted message from an IU source that was a reply to or a forward of an earlier message, or was composed and sent from the CRES system; these messages will have been encrypted at Cisco, not at IU.
  • You receive an encrypted message that has been autoforwarded, either from IU or from another account, or by your email client. See Forward your IU email.

In these cases, follow the instructions in Read a CRES-encrypted message. If you cannot view the message, see If you can't read a CRES-encrypted message. If you have forwarded your email, try to determine the address to which the envelope was originally sent, and use that address to register and read the message.

First-time users

  1. Save the securedoc envelope (that is, the email attachment) to your computer, and open it in your web browser.
  2. You will see an image of an envelope with information about the email message:
    • If the "To:" line has your full email address (, click REGISTER to begin the CRES registration process.
      If you open the securedoc file from within a web-based email client, you might not see the REGISTER button; instead, you will see a page with an OPEN button. Click OPEN; you will be directed to a page with a link to the new user registration form.
    • If the "To:" line has your campus domain address (, click My address is not listed, type in your Gmail at IU address (, and then click SUBMIT.
  3. On the next page, verify that your email address is in the "To:" line, and then click REGISTER.
  4. In the new user registration form, fill in the fields, including your name, password, security phrase, and security questions. Use a unique password; do not use your IU passphrase. Click Register.
  5. After you have completed the web form, you will receive a separate confirmation email message. In that message, click Click here to activate this account to complete your CRES registration.

You will see a web page confirming that you have activated your CRES account, and you can view the encrypted message using the directions in the "Existing users" section below.

Existing users

  1. Save the securedoc envelope to your computer, and open it in your web browser. (First-time users can simply refresh the page.)
    • If your address appears in the "To:" field, click Select a different address. Select Address not listed from the drop-down menu, type in your full student email address, and then click SUBMIT.
    • If your full student email address appears in the "To:" field, you do not need to change the address.
  2. Enter your CRES password and click OPEN to view the encrypted message and any attachments.

    If you entered a personal security phrase during registration, that phrase will appear when you click the password field. This allows you to be certain that you are providing your password to the genuine CRES site.

You can reply, reply to all, or forward the message; it will be re-encrypted when you reply or forward.

This is document bcbd in the Knowledge Base.
Last modified on 2019-11-19 10:08:28.

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