User Guide

User Manual BCM1000-BTW
11/12/04
Broadcom Corporation
Document 1000-BTW-UM400-R Security Page 39
1. From My Bluetooth Places, right-click a paired device, select Properties, and then the Authorization tab.
2. Select the services in the list box for which Authorization will NOT be required, and then click OK.
BLUETOOTH DEVICE IDENTITY
Every Bluetooth device has a unique Bluetooth Device Address (BDA) assigned to it during the manufacturing
process. This address cannot be changed.
The BDA is usually displayed in hexadecimal format; 00:D0:B7:03:2E:9F is a valid BDA.
Each Bluetooth device also has a configurable, user-friendly name to help distinguish it from other devices.
The user-friendly name may be up to 99 alphanumeric characters in length and may contain spaces. My
Personal Computer is a valid user-friendly name.
ENCRYPTION
Encrypting data translates it into an unreadable format using a secret key or password. Decrypting the data
requires the same key or password that was used to encrypt it.
LINK KEY
A link key is a unique, internally generated access code based on a passkey, the Bluetooth Device Address,
and an internally generated random number. Link keys are generated automatically when devices are paired.
After a link key is generated, manual entry of the passkey is not required.
PAIRING DEVICES
Pairing allows you to avoid manually entering access information each time a connection is attempted. Paired
devices share a unique link key, which they automatically exchange each time they connect.
Paired devices attempt to determine the feasibility of an operation before actually executing that operation.
In the following example of a feasibility check, Authorization, which requires the receiving device to approve
the connection (even though the devices are paired), is enabled.
1. A file is selected and sent to a paired remote service.
2. Before actually sending the file, the sending device transparently queries the server.
3. The server transparently replies that it has a file of that name in the folder to which the sender is attempt-
ing to write.
4. The sending device displays a Confirm File Replace window, which the user must acknowledge before the
connection can proceed.
5. The server displays an Authorization balloon over the notification area, which is located at the far right of
the taskbar.
Note: The devices must be paired.