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Extending messaging security to a BlackBerry device

If your organization's messaging environment supports highly secure messaging technology such as PGP® encryption or S/MIME encryption, you can configure the BlackBerry® Enterprise Solution to encrypt a message using PGP encryption or S/MIME encryption so that the message remains encrypted when the BlackBerry® Enterprise Server Express forwards the message to the email applications of recipients. To extend messaging security, the sender and recipient must install highly secure messaging technology on the computers that host the email applications and on their BlackBerry devices, and you must configure the BlackBerry devices to use the highly secure messaging technology.

Extending messaging security using PGP encryption

You can extend messaging security for the BlackBerry® Enterprise Solution and permit a BlackBerry device user to send and receive PGP® protected email messages and PGP protected PIN messages on a BlackBerry device. The BlackBerry Enterprise Solution supports the OpenPGP format and PGP/MIME format on the BlackBerry device.

To extend messaging security, you must instruct the BlackBerry device user to install the PGP® Support Package for BlackBerry® smartphones on the BlackBerry device and to transfer the PGP private key of the BlackBerry device user to the BlackBerry device. The BlackBerry device user can use the PGP private key to digitally sign, encrypt, and send PGP protected messages from the BlackBerry device. If a BlackBerry device user does not install the PGP Support Package for BlackBerry smartphones, the BlackBerry device displays an error message when the BlackBerry device user tries to open PGP protected messages.

To require the BlackBerry device user to use PGP encryption when forwarding or replying to messages, you can configure the PGP Force Digital Signature IT policy rule and the PGP Force Encrypted Messages IT policy rule.

The PGP Support Package for BlackBerry smartphones is designed to support encoding and decoding Unicode messages and permits PGP encryption using keys or passwords. The PGP Support Package for BlackBerry smartphones permits the BlackBerry device to encrypt PGP protected email messages or PGP protected PIN messages using a password that the sender and recipient both know.

For more information about the OpenPGP format, see RFC 2440. For more information about the PGP/MIME format, see RFC 3156.

Configure the BlackBerry Enterprise Solution to support PGP encryption

  1. Configure the PGP Universal Server Address IT policy rule in the IT policy that you assign to BlackBerry® device users.
  2. Instruct users to install the PGP® Support Package for BlackBerry® smartphones on BlackBerry devices.
  3. Instruct users to enroll with the PGP® Universal Server when the BlackBerry devices prompt them to so that the BlackBerry devices can process PGP protected messages.

Extending messaging security using S/MIME encryption

You can extend messaging security for the BlackBerry® Enterprise Solution and permit a BlackBerry device user to send and receive S/MIME-protected email messages and S/MIME-protected PIN messages on a BlackBerry device.

To extend messaging security, you or the BlackBerry device user must install the S/MIME Support Package for BlackBerry® smartphones on the BlackBerry device and transfer the S/MIME private key of the BlackBerry device user to the BlackBerry device. The S/MIME Support Package for BlackBerry smartphones is designed to work with email applications such as Microsoft® Outlook®, Microsoft Outlook Express, and IBM® Lotus Notes®, and with PKIs such as Netscape®, Entrust Authority™ Security Manager version 5 and later, and Microsoft certification authorities.

The BlackBerry device user uses the S/MIME private key to decrypt S/MIME-protected messages on the BlackBerry device and to sign, encrypt, and send S/MIME-protected messages from the BlackBerry device. If the BlackBerry® Enterprise Server Express receives an S/MIME-encrypted message but the BlackBerry device user did not install the S/MIME Support Package for BlackBerry smartphones, the BlackBerry Enterprise Server Express sends a message to the BlackBerry device to indicate that the BlackBerry device does not support S/MIME-encrypted messages.

After the BlackBerry device user installs the S/MIME Support Package for BlackBerry smartphones, the BlackBerry device user can synchronize and manage S/MIME certificates and S/MIME private keys using the certificate synchronization tool of the BlackBerry® Desktop Manager. The BlackBerry Enterprise Server Express does not apply an appended disclaimer to S/MIME-protected messages that the BlackBerry device user sends from the BlackBerry device. Digital signatures on S/MIME-protected messages that the BlackBerry device sends are not valid if disclaimers are appended to the messages.

To require the BlackBerry device user to use S/MIME encryption when forwarding or replying to messages, you can configure the S/MIME Force Digital Signature IT policy rule and the S/MIME Force Encrypted Messages IT policy rule.

The S/MIME Support Package for BlackBerry smartphones is also designed to support the following features:
  • encoding and decoding of Unicode messages
  • ability to use a password, which the sender and recipient each know, to encrypt S/MIME-protected email messages or PIN messages
  • ability to read S/MIME certificates that are stored on a smart card

Configure the BlackBerry Enterprise Solution to support S/MIME encryption

  1. Configure encryption options for S/MIME-protected messages on the BlackBerry® Enterprise Server Express.
  2. If required, configure the BlackBerry MDS Connection Service to retrieve certificates and the status of certificates from LDAP servers, DSML certificate servers, OCSP servers, or CRL servers.
  3. Instruct users to install the S/MIME Support Package for BlackBerry® smartphones on BlackBerry devices.
  4. Perform one of the following tasks:
    • Instruct users to add the Certificate Synchronization Manager to the BlackBerry® Desktop Manager so that the BlackBerry Desktop Manager can manage certificates for the BlackBerry devices.
    • Configure the BlackBerry Enterprise Server Express to permit users to enroll certificates over the wireless network.

Configure encryption options for S/MIME-protected messages

You can configure encryption options to control how the BlackBerry® Enterprise Server Express processes S/MIME-protected messages.
  1. In the BlackBerry Administration Service, on the Servers and components menu, expand BlackBerry Solution topology > BlackBerry Domain > Component view.
  2. In the Email section, click the instance that you want to change.
  3. Click Edit instance.
  4. On the Messaging tab, in the Security settings section, perform any of the following actions:
    • To require that the BlackBerry Enterprise Server Express encrypts messages using S/MIME encryption for a second time when the BlackBerry Enterprise Server Express processes S/MIME-protected messages that an S/MIME-enabled application weakly encrypted or only signed, in the Turn on S/MIME encryption on signed and weakly encrypted messages drop-down list, click True.
    • To permit BlackBerry device users that have email applications that do not support S/MIME to read the text of an S/MIME-protected message, in the Send S/MIME messages in clear-signed format drop-down list, click True.
    • To require that the BlackBerry Enterprise Server Express deletes attachment data from any signed-only S/MIME-protected messages so that the BlackBerry Enterprise Server Express conserves bandwidth, in the Remove attachment data from signed S/MIME messages drop-down list, click True.
    • To require that the BlackBerry Enterprise Server Express sends encrypted S/MIME-protected messages using an updated MIME content-type that is in accordance with PKCS#7 instead of the default legacy MIME content-type, in the Use PKCS #7 MIME type drop-down list, click True.
  5. Click Save all.
  6. To make sure that the changes take effect immediately, perform the following actions to restart the BlackBerry Messaging Agent:
    1. On the Servers and components menu, expand BlackBerry Solution topology > BlackBerry Domain > Component view > BlackBerry Enterprise Server.
    2. Click the BlackBerry Enterprise Server Express instance that includes the BlackBerry Messaging Agent.
    3. Click Restart instance.

Turn off support for processing S/MIME-protected messages on the BlackBerry Enterprise Server Express

By default, the BlackBerry® Enterprise Server Express can process S/MIME-protected messages. You can turn off support for processing S/MIME-protected messages if the BlackBerry Enterprise Server Express experiences issues when it processes S/MIME-protected messages or if your organization does not use S/MIME encryption.

  1. In the BlackBerry Administration Service, on the Servers and components menu, expand BlackBerry Solution topology > BlackBerry Domain > Component view.
  2. In the Email section, click the instance that you want to change.
  3. On the Messaging tab, click Edit instance.
  4. In the Security settings section, in the Turn on S/MIME message processing drop-down list, click False.
  5. Click Save All.

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