Blackberry ENTERPRISE SOLUTION SECURITY - SECURITY FOR DEVICES WITH BLUETOOTH WIRELESS TECHNOLOGY - TECHNICAL Guia do Utilizador descarregar pdf (Página 123)

3. The recipient decrypts the S/MIME-encrypted message using the S/MIME private key or a password that the sender

provides.

Data flow: Receiving an S/MIME-encrypted email

message

If a recipient installs the S/MIME Support Package for BlackBerry smartphones, the BlackBerry device decrypts incoming

email messages.

1. The sender uses the S/MIME technology on the email application to encrypt the email message using the S/MIME

certificate of the recipient.

2. The BlackBerry Enterprise Server performs the following actions:

a retrieves the S/MIME-encrypted message from the messaging server

b encrypts the email message a second time with S/MIME encryption if the email message is signed-only or weakly

encrypted and if you turned on the Turn on S/MIME encryption on signed and weakly encrypted messages option in

the

BlackBerry Administration Service

c uses BlackBerry transport layer encryption to encrypt the S/MIME-encrypted message

d sends the email message that is encrypted using BlackBerry transport layer encryption and S/MIME encryption to

the device

3. The device decrypts the BlackBerry transport layer encryption and stores the S/MIME-encrypted message in

BlackBerry device memory.

4. When the recipient opens the email message on the device, the device decrypts the S/MIME-encrypted message using

the S/MIME private key of the recipient and displays the message contents. If the email message is encrypted with a

password, the recipient types the password to decrypt the S/MIME-encrypted message.

Security Technical Overview Extending messaging security to a device

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Blackberry ENTERPRISE SOLUTION SECURITY - SECURITY FOR DEVICES WITH BLUETOOTH WIRELESS TECHNOLOGY - TECHNICAL Guia do Utilizador Página 123