Far fetched? What kind of microchip could be used?
How about a really small one?
Hitachi develops RFID powder: http://pinktentacle.com/2007/02/hitachi-develops-rfid-powder/
Far fetched? What kind of microchip could be used?
How about a really small one?
Hitachi develops RFID powder: http://pinktentacle.com/2007/02/hitachi-develops-rfid-powder/