Htc Touch by HTC VOGU100 User Manual download pdf (Page 86)

86 Working With Company E-mail and Meeting Appointments

8.5 E-mail Security

Windows Mobile protects your Outlook e-mails through Secure/Multipurpose Internet Mail Extension

(S/MIME), which allows you to digitally sign and encrypt your messages.

Digitally signing a message applies your certificate with the authorization key to the message. This proves to

the recipient that the message is from you and not from an impostor or a hacker, and that the message has

not been altered.

Encryption protects the privacy of your message by converting it from plain, readable text into cipher

(scrambled) text. Only the recipient who has the authorization key can decipher the message.

Requirement S/MIME encryption and digital signatures for Windows Mobile-based devices are available only with

Exchange Server 2003 SP2 or a later version that supports S/MIME. If your company is not using

one of these products, or you have not completed your first synchronization with the Exchange Server,

these options are unavailable.

Note You can encrypt a message with or without a certificate. However, to read an encrypted message, you need a valid

certificate to decrypt it.

To individually sign and encrypt a new message

1. Tap Start > Messaging > Outlook E-mail.

2. Tap Menu > New to create a new message.

3. Tap Menu > Message Options.

4. From the Security list, select whether to encrypt only, sign the message only, or do both.

5. Tap OK.

To verify the digital signature on a signed message you receive

1. Open the Outlook e-mail message that has been digitally signed.

2. At the top of the message, tap View Signature Status.

3. Tap Menu > Check Certificate. To view the details of the certificate in the message, tap Menu > View

Certificate.

Note There can be several reasons why a digital signature is not valid. For example, the sender’s certificate may

have expired, it may have been revoked by the certificate authority, or the server that verifies the certificate is

unavailable. Contact the sender to report the problem.

To digitally sign and encrypt all messages

You can set up ActiveSync to digitally sign and encrypt all outgoing messages. 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-mail information type, and tap Settings. On the E-mail Sync Options screen, tap

Advanced.

4. Do one or both of the following:

• To sign all your outgoing e-mail messages so that recipients can be certain that the messages

were sent by you and have not been altered in any way, select the Sign all outgoing e-mail

messages check box.

• To encrypt all your outgoing e-mail messages so that the contents of your messages are protected

from being viewed by anyone other than the intended recipients, select the Encrypt all outgoing

e-mail messages check box.

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Htc Touch by HTC VOGU100 User Manual Page 86

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