Blackberry BOLD 9780 User Manual page 98

User Guide
S/MIME-protected message basics
About signing and encrypting messages
If your email account uses a BlackBerry® Enterprise Server that supports this feature, you can digitally sign or encrypt messages
to add another level of security to email and PIN messages that you send from your BlackBerry device. Digital signatures are
designed to help recipients verify the authenticity and integrity of messages that you send. When you digitally sign a message
using your private key, recipients use your public key to verify that the message is from you and that the message has not been
changed.
Encryption is designed to keep messages confidential. When you encrypt a message, your device uses the recipient's public key
to encrypt the message. Recipients use their private key to decrypt the message.
To send an encrypted PIN message, you must have a PIN and an email address for the contact in your contact list. Your device
uses the email address in your contact list to locate a PGP® key or certificate for the contact.
Sign or encrypt a message
You can sign or encrypt email and PIN messages.
1. When you are composing a message, change the Encoding field.
2. If necessary, change the Classification field.
Related information
Some signing and encryption options aren't available on my device, 101
Encrypt a message with a pass phrase
Your BlackBerry® device can encrypt email and PIN messages using a pass phrase shared between the sender and recipient.
1. In an unsent message, set the Encoding field to Encrypt or Sign and Encrypt.
2. Press the
key > Options.
3. Select the Use Password-Based Encryption check box.
4. In the Allowed Content Ciphers section, select the check box beside one or more allowed content ciphers.
5. If you are signing the message, in the Signing Options section, select a certificate.
6. Press the
key > Save.
7. Type your message.
8. Press the
key > Send.
9. Type a pass phrase to encrypt the message.
10. Confirm the pass phrase.
11. Click OK.
Using a secure method, let the recipient know what the pass phrase is.
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Messages