RFID Passports
Since the terrorist attacks of 2001, the Bush administration—specifically, the Department of Homeland Security—has wanted the world to agree on a standard for machine-readable passports. Countries whose citizens currently do not have visa requirements to enter the United States will have to issue passports that conform to the standard or risk losing their nonvisa status.
These future passports, currently being tested, will include an embedded computer chip. This chip will allow the passport to contain much more information than a simple machine-readable character font, and will allow passport officials to quickly and easily read that information. That is a reasonable requirement and a good idea for bringing passport technology into the 21st century.
But the Bush administration is advocating radio frequency identification (RFID) chips for both U.S. and foreign passports, and that’s a very bad thing.
These chips are like smart cards, but they can be read from a distance. A receiving device can “talk” to the chip remotely, without any need for physical contact, and get whatever information is on it. Passport officials envision being able to download the information on the chip simply by bringing it within a few centimeters of an electronic reader.
Unfortunately, RFID chips can be read by any reader, not just the ones at passport control. The upshot of this is that travelers carrying around RFID passports are broadcasting their identity.
Think about what that means for a minute. It means that passport holders are continuously broadcasting their name, nationality, age, address and whatever else is on the RFID chip. It means that anyone with a reader can learn that information, without the passport holder’s knowledge or consent. It means that pickpockets, kidnappers and terrorists can easily—and surreptitiously—pick Americans or nationals of other participating countries out of a crowd.
It is a clear threat to both privacy and personal safety, and quite simply, that is why it is bad idea. 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.
Security is always a trade-off. If the benefits of RFID outweighed the risks, then maybe it would be worth it. Certainly, there isn’t a significant benefit when people present their passport to a customs official. If that customs official is going to take the passport and bring it near a reader, why can’t he go those extra few centimeters that a contact chip—one the reader must actually touch—would require?
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.
This article originally appeared in the 4 October 2004 edition of the International Herald Tribune.
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Rick • November 17, 2005 6:54 PM
Thanks for the article “The Security of RFID Passports”!
If one must scan the passport with an optical reader in order to
obtain the key with which to decrypt the RFID information, then
what’s the point of using RFID? The only benefit RFID provides over a
contact chip is the ability to read the card at a distance (and
presumably some additional reliability, although I doubt that even
the most frequent user will approach the use of a smart credit card).
Furthermore, once they’re required to optically scan the passport,
then it seems that they may as well encode all the data optically.
The only advantage of RFID there is possibly greater storage
capacity, something a contact chip could provide. (Although, as far
as I know, RFID systems hold very little data).
Finally, there are at least two classes of RFID: those that avoid
collisions and those that don’t. A passport that must be held by hand
an optically scanned can use the latter of these, and not require any
collision-avoidance data.
Many of these points are moot, of course, if the State Department’s
ulterior motive is the ability to read passports at a distance…