Editing Bluetooth (section)

==== Implementation ====
During pairing, the two devices establish a relationship by creating a [[shared secret]] known as a ''link key''. If both devices store the same link key, they are said to be ''paired'' or ''bonded''. A device that wants to communicate only with a bonded device can [[cryptography|cryptographically]] [[authentication|authenticate]] the identity of the other device, ensuring it is the same device it previously paired with. Once a link key is generated, an authenticated [[Asynchronous connection-oriented logical transport|ACL]] link between the devices may be [[encryption|encrypted]] to protect exchanged data against [[eavesdropping]]. Users can delete link keys from either device, which removes the bond between the devices—so it is possible for one device to have a stored link key for a device it is no longer paired with.

Bluetooth services generally require either encryption or authentication and as such require pairing before they let a remote device connect. Some services, such as the Object Push Profile, elect not to explicitly require authentication or encryption so that pairing does not interfere with the user experience associated with the service use-cases.