Methods for authenticating device-to-device communication

Abstract

Devices and methods are described to enable devices to be paired in a convenient and secure way based on proximity with the use of a single radio transmission protocol. Using devices configurable to perform the processes described, users are able to pair Bluetooth enabled devices or other radio communication protocols simply by putting the devices briefly in contact, or within close proximity, usually few centimeters. When the two devices touch or are in close proximity, the encryption key is shared across the two devices without further interaction required by the user. The encryption key is not made visible, so one potential source of security breach is eliminated. After first setup, proximity is not required and the device can communicate securely based on the previously exchanged security tokens (and encryption keys) without the requirement of proximity. This method is hence superior to all other authentication methods in use as it combines the benefit of an easy setup/configuration with the use of secure communications and cheaper design and manufacturing.