Bluetooth Device Identity; Encryption; Link Key; Pairing Devices - HP Bt500 User Manual

Chapter 2
NOTE:
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 attempting 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.
The server user must acknowledge the Authorization balloon or the connection will fail
and the file will not be transferred.
48 HP bt500 Bluetooth USB 2.0 Wireless Printer Adapter
The devices must be paired.