HTC HERA100 user manual Digitally sign and encrypt all messages

Synchronizing Information and Setting Up E-mail Security 67

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 to decrypt it.

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 are not 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 must obtain a valid certificate to sign and encrypt e-mail messages successfully.

1.Tap Start > Programs > ActiveSync.

2.Tap Menu > Options.

3.Select the E-mailinformation type, and tap Settings. On the E-mail Sync Options screen, tap Advanced.