Method, transponder, and system for secure data exchange

A circuit configured to:

• transmit a first code, by a transponder, in response to receiving a first request from
• a base station;
• receive 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;
• extract the base station code from the first encoded transmission information using the first code and the first identification;
• transmit a second code in response to receiving a second request from the base station, the second code encoded using the extracted base station code;
• receive second encoded transmission information, from the base station, the second encoded transmission information comprising a second identification encoded using the second code;
• extract the second identification from the second encoded transmission information using the second code;
• and
• compare the extracted second information 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.

An apparatus comprising:

• a memory area;
• and
• one or more computer-readable non-transitory storage media coupled to memory area that embody logic that is configured when executed to:
• transmit a first code by a transponder in response to receiving a request from a base station;
• receive 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;
• extract the base station code from the first encoded transmission using the first code and the first identification;
• transmit a second code in response to receiving a second request from the base station, the second code encoded using the extracted base station code;
• receive second encoded transmission information from the base station, the second encoded information comprising a second identification encoded by the base station using the second code;
• extract the second identification is extracted by the transponder from the second encoded transmission information and verified, and
• compare the extracted second identification to a stored version of the second identification, access to at least one memory region provided based on the comparing of the extracted second identification.