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54 Synchronizing Information and Setting Up E-mail Security
4.5 Setting up E-mail Security
Windows Mobile on your device protects your Outlook e-mails through Secure/Multipurpose
Internet Mail Extension (S/MIME), which allows you to digitally sign your messages as well
as encrypt them.
Using authorization keys and certificates, S/MIME allows you to digitally sign your e-mail
messages to prove your identity to the recipients. Authorization keys are also used when
encrypting messages to improve privacy and prevent undue tampering or hacking of your
messages. You can encrypt a message with or without a certificate. However, to read an
encrypted message, you need a valid certificate for decrypting e-mail messages.
Note
S/MIME encryption and digital signatures for Windows Mobile-based devices are available only
with Exchange Server 2003 Service Pack 2 or a later version that supports S/MIME. If you aren't
using one of these products, or have not yet synchronized, these options are unavailable.
Digitally sign and encrypt all messages
ActiveSync allows you to set up S/MIME e-mail encryption and signing. You will have to
obtain a valid certificate for signing or encrypting e-mail before you will be able to sign or
encrypt mail successfully.
1.
Tap Start > Programs > ActiveSync.
2.
Tap Menu > Options.
3.
Select the E-mail information type, and tap Settings. On the E-mail Sync Options
screen, tap Advanced.
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