Blackberry 9380 manual About signing and encrypting messages

User Guide Messages

S/MIME and PGP protected messages

S/MIME and PGP 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 smartphone. 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 hasn't been changed.

Encryption is designed to keep messages confidential. When you encrypt a message, your smartphone 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 smartphone 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.

If you use a PGP Universal Server, your administrator might have set options so that the PGP Universal Server always signs or encrypts your messages.

1.When you are composing a message, change the Encoding field.

2.If necessary, change the Classification field.

3.To change the certificate that you use to send the message, press the key > Options.

•To change the signing or encryption certificate, change a Certificate field.

•To encrypt the message using only the recipient’s certificate, in the Encryption Options section, change the Certificate field to None.

•To send the message without including your certificate, change the Include Certificate field to No.

If you change the Certificate field to None, you cannot read the message after you send it.

If you encrypt a message and keys are not available for all recipients, you might be able to click Send to Server to send the message to the PGP Universal Server. If the PGP Universal Server locates the keys, it encrypts the message. Otherwise, it might send the message as plain text.

Related information

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Encrypt an S/MIME or a PGP protected message with a passphrase

By default, your BlackBerry smartphone uses your certificate or PGP key to encrypt messages.

1.When composing a message, change the Encoding field to an option that uses encryption.

2.

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