Patent ID: 7370200

Claim:
A method of validating a device association using a succession of human-perceptible stimuli comprising: sending commands from an initiating device to a responding device in encrypted messages; forming human-perceptible stimuli of the succession at the responding device in response to at least some of the commands; forming at least some of the human-perceptible stimuli of the succession at the initiating device, wherein an association between the initiating device and the responding device is validated when the succession of human perceptible-stimuli formed by the initiating device and by the responding device is perceptibly harmonized; and searching for messages received at the responding device that the responding device is unable to decrypt and that are received in a time interval before messages that the responding device is able to decrypt; and indicating an unsuccessful association when a number of messages are received at the responding device that the responding device is unable to decrypt and that are received in a time interval before messages that the responding device is able to decrypt.