Options for extending messaging security
When a user sends a message from the BlackBerry® device, by default, the BlackBerry® Enterprise Server does not encrypt the message when it forwards the message to the message recipient. To extend the messaging security that standard BlackBerry encryption provides, the user must install additional secure messaging technology on the BlackBerry device, and you must set the BlackBerry device to use that secure messaging technology.
To offer an additional layer of messaging security between the sender and recipient of an email message or PIN message, you can turn on S/MIME technology or PGP® technology for BlackBerry devices. When you use either one of these technologies, you allow sender-to-recipient authentication and confidentiality. These technologies also help to maintain the integrity and privacy of the data from the time that a BlackBerry device user sends a message from the BlackBerry device to when the message recipient decrypts and opens the message.