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Blackberry PlayBook Tablet 보안 기술 개요
Security Technical Overview
Connecting a tablet to a smartphone that is activated on
the BlackBerry Enterprise Server or BlackBerry Internet
Service
If a BlackBerry PlayBook tablet connects to a BlackBerry smartphone that was activated on a BlackBerry Enterprise
Server, the data that the smartphone stores on the tablet is classified as work data. Work data is stored separately
from personal data and is protected using the BlackBerry Bridge work key. During the BlackBerry Bridge pairing
process, the tablet and smartphone share the BlackBerry Bridge work key. The BlackBerry Bridge work key
encrypts the keys that encrypt and decrypt data that is stored on the tablet.
If a tablet connects to a smartphone that was activated on the BlackBerry Internet Service only, then the data that
the smartphone stores on the tablet is considered personal data. Personal data that is stored on the tablet is not
encrypted.

Process flow: Generating a BlackBerry Bridge work key

1.
During the BlackBerry Bridge pairing process, the BlackBerry smartphone generates a random 256-bit key and
sends it to the BlackBerry PlayBook tablet.
2.
The tablet uses SHA-512 to hash the key that it receives from the smartphone with the tablet system key to
produce the BlackBerry Bridge work key.
The tablet system key is created during the manufacturing process and is the SHA-512 hash of a hardware ID
and a 512-bit random key.

Reconnecting a tablet to a smartphone

The BlackBerry PlayBook tablet is designed to reconnect automatically to a BlackBerry smartphone that it was
previously connected to if the tablet did not delete the Bluetooth key or BlackBerry Bridge pairing key.
If you reconnect a tablet to a smartphone that requires a password, you must type the smartphone password on
the tablet. The tablet and smartphone then perform the Bluetooth pairing process and BlackBerry Bridge pairing
process. The smartphone uses the previous BlackBerry Bridge work key to decrypt the keys that were used to
encrypt the data that the smartphone stored on the tablet when the tablet and smartphone were previously
connected. The previous BlackBerry Bridge work key is stored in the memory of the smartphone.

Deleting a tablet and smartphone connection

You can delete a BlackBerry PlayBook tablet and BlackBerry smartphone connection in the Bluetooth settings on a
tablet. If you delete a tablet and smartphone connection on a tablet, the tablet performs the following actions:
Closes all work applications
Erases the Bluetooth key and BlackBerry Bridge pairing key from memory
Deletes the work file system and erases the BlackBerry Bridge work key from memory
Connecting a tablet to a smartphone that is activated on the BlackBerry Enterprise Server or
BlackBerry Internet Service
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