suppose Team Red wants to make RFID tags that only their own "authorized" scanners can pick up, such as for tagging merchandise in Walmart. Meanwhile Team Blue wants to be able to find any Team Red tags on items or prove that they are not there. They don't need to extract any info from the tags, only establish their existence and hopefully location. Who would win, now and in the foreseeable future? Can Team Red achieve "security through obscurity" for their tags? Or can Team Blue detect the presence of the miniature chip antennas regardless of manufacturer's countermeasures?