Patent ID: 8138889

Claim:
A method comprising: transmitting a first code, by a transponder, in response to receiving a first request from a base station; receiving first encoded transmission information from the base station, the first encoded transmission information comprising a base station code encoded using the first code and a first identification; extracting the base station code from the first encoded transmission information using the first code and the first identification; transmitting a second code in response to receiving a second request from the base station, the second code encoded using the extracted base station code; receiving second encoded transmission information from the base station, the second encoded transmission information comprising a second identification encoded by the base station using the second code; extracting the second identification from the second encoded transmission information using the second code; and comparing the extracted second identification to a stored version of the second identification, access to at least one memory region of the transponder provided based on the comparing of the extracted second identification.