Verified
Pairs of devices may establish a trusted relationship by learning (by user input) a shared secret known as a “passkey”. A device which wants to communicate only with a trusted device can cryptographically authenticate the identity of the other device. Trusted devices might also encrypt the data that they exchange over the air so that no one can listen in. However, the encryption can be turned off and passkeys are stored on the device’s file system and not Bluetooth chip itself. As the Bluetooth address is permanent a pairing will be preserved even if the Bluetooth name is altered. Pairs can be removed at any time by either device.