You can encrypt messages to prevent them from being read by unauthorized persons. It is, of course, true that with significant amounts of computing power and time any encryption scheme can probably be broken. However, the chances of someone investing those resources in your e-mail are pretty remote. So you can be assured that the e-mail encryption Outlook 2007 provides offers a relatively safe means of protecting sensitive messages against interception.
Before you can encrypt messages, you must have a certificate for that purpose installed on your computer. Typically, certificates issued for digital signing can also be used for encrypting e-mail messages.
For detailed information on obtaining a personal certificate from a ...