Filed under: Misc. Gadgets, WirelessLukas Grunwald -- last seen cloning Germany's RFID passports -- is back with more "white hat" hackery on the worlds' new e-passport systems. This time, however, he's crashing RFID readers to demonstrate how a hacked passport could conceivably force approval of expired or forged passports. After all, "If you're able to crash something you are most likely able to exploit it," says Grunwald. Lukas was able to crash two passport readers made by different vendors by first cloning a passport's chip and then modding the JPEG2000 image file stored within the chip to create a buffer-overun condition -- the same vul