Project PDA

Bonding, also called pairing, is the process by which trust is established between two Bluetooth devices. Before you can do either task, you need to establish a Bluetooth connection between the two Pocket PCs using the Bluetooth Manager to create a bond between them.

Bluetooth bonding (or pairing) is an essential part in getting a bluetooth connection to work. This page explains how to connect to a Bluetooth device.

Bluetooth is a great tochnology, if you know what to do to get it working. One of the most important steps in using bluetooth is bonding: it shows that devices are trusted and can use each others services.

The user is required to input matching codes, called personal identification numbers (PINs), into the two devices. In some situations, one of the devices may have the PIN pre-set—for example, some headsets come with a PIN of 0000. PINs are typically a sequence of digits; they provide little security, and they are intended only for the initial pairing. Given a successful match of PIN, the devices negotiate a link key, a much more cryptographically secure code, which is used thereafter as an access control mechanism between the two devices.

After bonding, paired Bluetooth devices associate to each other whenever they want to exchange data. As each connection is established, devices exchange challenge-response messages to demonstrate possession of the link key created during bonding.