Patent ID: 7720018

Claim:
A computer-readable medium having thereon computer-executable instructions for performing a method comprising: operating a first device in a first mode; activating an indicator to operate the first device in a second mode; and operating the first device in the second mode, the second mode having a low transmit power setting for the first device that is sufficient for a wireless exchange of messages between the first device and a second device, the second device having access to secret information, wherein operating the first device in the second mode comprises: attempting to exchange a schema in a first schema exchange at a safe power transmit level, when the first schema exchange is successful, decrementing transmit power of the first device and exchanging schema in a further schema exchange until the further schema exchange is unsuccessful, wherein the safe power transmit level is a power level for which successful exchange of the first schema between the first device and the second device is only expected when a distance between the first device and the second device is less than a maximum safe distance, the maximum safe distance being no greater than three meters, and when the first schema exchange is not successful, providing feedback to a user that the first device needs to be placed in closer proximity to the second device; once a further schema exchange is unsuccessful, incrementing transmit power and exchanging schema again until a schema exchange is successful at a first transmit power level; and setting the first transmit power level as the low transmit power setting; wherein schema is selected from a group consisting of an output of a cyclic redundancy check and a cyclic redundancy check codeword; wherein the decrementing comprises decreasing the transmit power by a first amount and the incrementing comprises increasing the transmit power by a second amount, the first amount being greater than the second amount; setting the transmit power of the first device to the low transmit power setting; and receiving the secret information from the second device via wireless media while at the low transmit power setting, wherein the first mode is associated with a first transmit power setting different than the low transmit power setting associated with the second mode.