Blackberry Curve 8520 - Manual (Page 68)

S/MIME-protected message troubleshooting
Some signing and encryption options are not available on my device
Try performing the following actions:
• Verify that the email account that you are using supports all signing and encryption options.
• If you use message classifications, verify that the message classification supports the signing or encryption options that you want. Try
using a different message classification.
I cannot open an attachment in an encrypted message
The attachment information might not be available on the BlackBerry® Enterprise Server, your administrator might have set options to prevent
you from opening attachments in encrypted messages, or you might have received the message from an email account that does not support
attachments in encrypted messages.
You cannot open an attachment in a PGP® protected message that was encrypted using the OpenPGP format by an IBM® Lotus Notes® client
working with PGP® Desktop Professional or that was encrypted by the PGP® Universal Server.
PGP protected messages
PGP protected message basics
About signing and encrypting messages
You can digitally sign or encrypt messages to add another level of security to email messages 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 messages and PIN messages.
1.
When composing a message, change the Encoding field.
2. If necessary, change the Classification field.
User Guide PGP protected messages
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