Toppan develops paper that protects RFID data
Toppan Printing developed paper that protects RFID cards such as RFID train passes, corporate ID cards, RFID payment cards from skimming attacks. It functions as so-called Faradey Cage, that is, the paper has a very thin layer of metal in it (by the way, the paper's thickness is about 0.2mm). So, wrapping an RFID card with the paper is like wrapping it with a metal sheet that shuts out electro-magnetic fields. The company plans to commercialize the technology by this fall.
via MSN-Mainichi Interactive, May 27, in Japanese