http://www.jsonline.com/bym/tech/news/jan05/289738.asp
One rudimentary way to protect electronic passports from identity thieves is to wrap them in tinfoil, which blocks radio waves. A single size Doritos bag would do the trick. Protecting border control agents' readers with a metal shield would protect against eavesdropping.
http://www.iht.com/articles/541711.html
Proponents of the system claim that the chips can be read only from within a distance of a few centimeters, so there is no potential for abuse. This is a spectacularly naïve claim. All wireless protocols can work at much longer ranges than specified. In tests, RFID chips have been read by receivers 20 meters away. Improvements in technology are inevitable.
...
The Bush administration is deliberately choosing a less secure technology without justification. If there were a good offsetting reason to choose that technology over a contact chip, then the choice might make sense.
Unfortunately, there is only one possible reason: The administration wants surreptitious access themselves. It wants to be able to identify people in crowds. It wants to surreptitiously pick out the Americans, and pick out the foreigners. It wants to do the very thing that it insists, despite demonstrations to the contrary, can't be done.
Normally I am very careful before I ascribe such sinister motives to a government agency. Incompetence is the norm, and malevolence is much rarer. But this seems like a clear case of the Bush administration putting its own interests above the security and privacy of its citizens, and then lying about it.