Entries Tagged "identification"

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Heathrow Tests Biometric ID

Heathrow airport is testing an iris scan biometric machine to identify passengers at customs.

I’ve written previously about biometrics: when they work and when they fail:

Biometrics are powerful and useful, but they are not keys. They are useful in situations where there is a trusted path from the reader to the verifier; in those cases all you need is a unique identifier. They are not useful when you need the characteristics of a key: secrecy, randomness, the ability to update or destroy. Biometrics are unique identifiers, but they are not secrets.

The system under trial at Heathrow is a good use of biometrics. There’s a trusted path from the person through the reader to the verifier; attempts to use fake eyeballs will be immediately obvious and suspicious. The verifier is being asked to match a biometric with a specific reference, and not to figure out who the person is from his or her biometric. There’s no need for secrecy or randomness; it’s not being used as a key. And it has the potential to really speed up customs lines.

Posted on October 26, 2006 at 1:04 PM • View Comments

Screening People with Clearances

Why should we waste time at airport security, screening people with U.S. government security clearances? This perfectly reasonable question was asked recently by Robert Poole, director of transportation studies at The Reason Foundation, as he and I were interviewed by WOSU Radio in Ohio.

Poole argued that people with government security clearances, people who are entrusted with U.S. national security secrets, are trusted enough to be allowed through airport security with only a cursory screening. They’ve already gone through background checks, he said, and it would be more efficient to concentrate screening resources on everyone else.

To someone not steeped in security, it makes perfect sense. But it’s a terrible idea, and understanding why teaches us some important security lessons.

The first lesson is that security is a system. Identifying someone’s security clearance is a complicated process. People with clearances don’t have special ID cards, and they can’t just walk into any secured facility. A clearance is held by a particular organization—usually the organization the person works for—and is transferred by a classified message to other organizations when that person travels on official business.

Airport security checkpoints are not set up to receive these clearance messages, so some other system would have to be developed.

Of course, it makes no sense for the cleared person to have his office send a message to every airport he’s visiting, at the time of travel. Far easier is to have a centralized database of people who are cleared. But now you have to build this database. And secure it. And ensure that it’s kept up to date.

Or maybe we can create a new type of ID card: one that identifies people with security clearances. But that also requires a backend database and a card that can’t be forged. And clearances can be revoked at any time, so there needs to be some way of invalidating cards automatically and remotely.

Whatever you do, you need to implement a new set of security procedures at airport security checkpoints to deal with these people. The procedures need to be good enough that people can’t spoof it. Screeners need to be trained. The system needs to be tested.

What starts out as a simple idea—don’t waste time searching people with government security clearances—rapidly becomes a complicated security system with all sorts of new vulnerabilities.

The second lesson is that security is a trade-off. We don’t have infinite dollars to spend on security. We need to choose where to spend our money, and we’re best off if we spend it in ways that give us the most security for our dollar.

Given that very few Americans have security clearances, and that speeding them through security wouldn’t make much of a difference to anyone else standing in line, wouldn’t it be smarter to spend the money elsewhere? Even if you’re just making trade-offs about airport security checkpoints, I would rather take the hundreds of millions of dollars this kind of system could cost and spend it on more security screeners and better training for existing security screeners. We could both speed up the lines and make them more effective.

The third lesson is that security decisions are often based on subjective agenda. My guess is that Poole has a security clearance—he was a member of the Bush-Cheney transition team in 2000—and is annoyed that he is being subjected to the same screening procedures as the other (clearly less trusted) people he is forced to stand in line with. From his perspective, not screening people like him is obvious. But objectively it’s not.

This issue is no different than searching airplane pilots, something that regularly elicits howls of laughter among amateur security watchers. What they don’t realize is that the issue is not whether we should trust pilots, airplane maintenance technicians or people with clearances. The issue is whether we should trust people who are dressed as pilots, wear airplane-maintenance-tech IDs or claim to have clearances.

We have two choices: Either build an infrastructure to verify their claims, or assume that they’re false. And with apologies to pilots, maintenance techs and people with clearances, it’s cheaper, easier and more secure to search you all.

This is my twenty-eighth essay for Wired.com.

Posted on October 5, 2006 at 8:27 AM • View Comments

Renew Your Passport Now!

If you have a passport, now is the time to renew it—even if it’s not set to expire anytime soon. If you don’t have a passport and think you might need one, now is the time to get it. In many countries, including the United States, passports will soon be equipped with RFID chips. And you don’t want one of these chips in your passport.

RFID stands for “radio-frequency identification.” Passports with RFID chips store an electronic copy of the passport information: your name, a digitized picture, etc. And in the future, the chip might store fingerprints or digital visas from various countries.

By itself, this is no problem. But RFID chips don’t have to be plugged in to a reader to operate. Like the chips used for automatic toll collection on roads or automatic fare collection on subways, these chips operate via proximity. The risk to you is the possibility of surreptitious access: Your passport information might be read without your knowledge or consent by a government trying to track your movements, a criminal trying to steal your identity or someone just curious about your citizenship.

At first the State Department belittled those risks, but in response to criticism from experts it has implemented some security features. Passports will come with a shielded cover, making it much harder to read the chip when the passport is closed. And there are now access-control and encryption mechanisms, making it much harder for an unauthorized reader to collect, understand and alter the data.

Although those measures help, they don’t go far enough. The shielding does no good when the passport is open. Travel abroad and you’ll notice how often you have to show your passport: at hotels, banks, Internet cafes. Anyone intent on harvesting passport data could set up a reader at one of those places. And although the State Department insists that the chip can be read only by a reader that is inches away, the chips have been read from many feet away.

The other security mechanisms are also vulnerable, and several security researchers have already discovered flaws. One found that he could identify individual chips via unique characteristics of the radio transmissions. Another successfully cloned a chip. The State Department called this a “meaningless stunt,” pointing out that the researcher could not read or change the data. But the researcher spent only two weeks trying; the security of your passport has to be strong enough to last 10 years.

This is perhaps the greatest risk. The security mechanisms on your passport chip have to last the lifetime of your passport. It is as ridiculous to think that passport security will remain secure for that long as it would be to think that you won’t see another security update for Microsoft Windows in that time. Improvements in antenna technology will certainly increase the distance at which they can be read and might even allow unauthorized readers to penetrate the shielding.

Whatever happens, if you have a passport with an RFID chip, you’re stuck. Although popping your passport in the microwave will disable the chip, the shielding will cause all kinds of sparking. And although the United States has said that a nonworking chip will not invalidate a passport, it is unclear if one with a deliberately damaged chip will be honored.

The Colorado passport office is already issuing RFID passports, and the State Department expects all U.S. passport offices to be doing so by the end of the year. Many other countries are in the process of changing over. So get a passport before it’s too late. With your new passport you can wait another 10 years for an RFID passport, when the technology will be more mature, when we will have a better understanding of the security risks and when there will be other technologies we can use to cut the risks. You don’t want to be a guinea pig on this one.

This op ed appeared on Saturday in the Washington Post.

I’ve written about RFID passports many times before (that last link is an op-ed from The International Herald-Tribune), although last year I—mistakenly—withdrew my objections based on the security measures the State Department was taking. I’ve since realized that they won’t be enough.

EDITED TO ADD (9/29): This op ed has appeared in about a dozen newspapers. The San Jose Mercury News published a rebuttal. Kind of lame, I think.

EDITED TO ADD (12/30): Here’s how to disable a RFID passport.

Posted on September 18, 2006 at 6:06 AM • View Comments

DHS Report on US-VISIT and RFID

Department of Homeland Security, Office of the Inspector General, “Enhanced Security Controls Needed For US-VISIT’s System Using RFID Technology (Redacted),” OIG-06-39, June 2006.

From the Executive Summary:

We audited the Department of Homeland Security (DHS) and select organizational components’ security programs to evaluate the effectiveness of controls implemented on Radio Frequency Identification (RFID) systems. Systems employing RFID technology include a tag and reader on the front end and an application and database on the back end.

[…]

Overall, information security controls have been implemented to provide an effective level of security on the Automated Identification Management System (AIDMS). US-VISIT has implemented effective physical security controls over the RFID tags, readers, computer equipment, and database supporting the RFID system at the POEs visited. No personal information is stored on the tags used for US-VISIT. Travelers’ personal information is maintained in and can be obtained only with access to the system’s database. Additional security controls would need to be implemented if US-VISIT decides to store travelers’ personal information on RFID-enabled forms or migrates to universally readable Generation 2 (Gen2) products.

Although these controls provide overall system security, US-VISIT has not properly configured its AIDMS database to ensure that data captured and stored is properly protected. Furthermore, while AIDMS is operating with an Authority to Operate, US-VISIT had not tested its contingency plan to ensure that critical operations could be restored in the event of a disruption. In addition, US-VISIT has not developed its own RFID policy or ensured that the standard operating procedures are properly distributed and followed at all POEs.

I wrote about US-VISIT in 2004 and again in 2006. In that second essay, I gave a price of $15B. I have since come to not believe that data, and I don’t have any better information on the price. But I still think my analysis holds. I would much rather take the money spent on US-VISIT and spend it on intelligence and investigation, the kind of security that resulted in the U.K. arrests earlier this week and is likely to actually make us safer.

Posted on August 11, 2006 at 7:27 AM • View Comments

Hackers Clone RFID Passports

It was demonstrated today at the BlackHat conference.

Grunwald says it took him only two weeks to figure out how to clone the passport chip. Most of that time he spent reading the standards for e-passports that are posted on a website for the International Civil Aviation Organization, a United Nations body that developed the standard. He tested the attack on a new European Union German passport, but the method would work on any country’s e-passport, since all of them will be adhering to the same ICAO standard.

In a demonstration for Wired News, Grunwald placed his passport on top of an official passport-inspection RFID reader used for border control. He obtained the reader by ordering it from the maker—Walluf, Germany-based ACG Identification Technologies—but says someone could easily make their own for about $200 just by adding an antenna to a standard RFID reader.

He then launched a program that border patrol stations use to read the passports—called Golden Reader Tool and made by secunet Security Networks—and within four seconds, the data from the passport chip appeared on screen in the Golden Reader template.

Grunwald then prepared a sample blank passport page embedded with an RFID tag by placing it on the reader—which can also act as a writer—and burning in the ICAO layout, so that the basic structure of the chip matched that of an official passport.

As the final step, he used a program that he and a partner designed two years ago, called RFDump, to program the new chip with the copied information.

The result was a blank document that looks, to electronic passport readers, like the original passport.

I’ve long been opposed (that last link is an op-ed from The International Herald-Tribune) to RFID chips in passports, although last year I—mistakenly—withdrew my objections based on the security measures the State Department was taking.

That’s silly. I’m not opposed to chips on ID cards, I am opposed to RFID chips. My fear is surreptitious access: someone could read the chip and learn your identity without your knowledge or consent.

Sure, the State Department is implementing security measures to prevent that. But as we all know, these measures won’t be perfect. And a passport has a ten-year lifetime. It’s sheer folly to believe the passport security won’t be hacked in that time. This hack took only two weeks!

The best way to solve a security problem is not to have it at all. If there’s an RFID chip on your passport, or any of your identity cards, you have to worry about securing it. If there’s no RFID chip, then the security problem is solved.

Until I hear a compelling case for why there must be an RFID chip on a passport, and why a normal smart-card chip can’t do, I am opposed to the idea.

Crossposted to the ACLU blog.

Posted on August 3, 2006 at 3:45 PM • View Comments

Good Example of Smart Profiling

In Beyond Fear, I wrote about profiling (reprinted here). I talked a lot about how smart behavioral-based profiling is much more effective than dumb characteristic-based profiling, and how well-trained people are much better than computers.

The story I used was about how U.S. customs agent Diana Dean caught Ahmed Ressam in 1999. Here’s another story:

An England football shirt gave away a Senegalese man attempting to enter Cyprus on a forged French passport, police on the Mediterranean island said on Monday.

Suspicions were aroused when the man appeared at a checkpoint supervising crossings from the Turkish Cypriot north to the Greek Cypriot south of the divided island, wearing the England shirt and presenting a French passport.

“Being a football fan, the officer found it highly unlikely that a Frenchman would want to wear an England football jersey,” a police source said.

“That was his first suspicion prior to the proper check on the passport, which turned out to be a fake,” said the source.

That’s just not the kind of thing you’re going to get a computer to pick up on, at least not until artificial intelligence actually produces a working brain.

Posted on July 27, 2006 at 12:46 PM • View Comments

Identity Theft and Methamphetamines

New trend or scary rumor?

When methamphetamine proliferated more recently, the police and prosecutors at first did not associate it with a rise in other crimes. There were break-ins at mailboxes and people stealing documents from garbage, Mr. Morales said, but those were handled by different parts of the Police Department.

But finally they connected the two. Meth users—awake for days at a time and able to fixate on small details—were looking for checks or credit card numbers, then converting the stolen identities to money, drugs or ingredients to make more methamphetamine. For these drug users, Mr. Morales said, identity theft was the perfect support system.

Supposedly meth users are ideally suited to be computer hackers:

For example, crack cocaine or heroin dealers usually set up in well-defined urban strips run by armed gangs, which stimulates gun traffic and crimes that are suited to densely populated neighborhoods, including mugging, prostitution, carjacking and robbery. Because cocaine creates a rapid craving for more, addicts commit crimes that pay off instantly, even at high risk.

Methamphetamine, by contrast, can be manufactured in small laboratories that move about suburban or rural areas, where addicts are more likely to steal mail from unlocked boxes. Small manufacturers, in turn, use stolen identities to buy ingredients or pay rent without arousing suspicion. And because the drug has a long high, addicts have patience and energy for crimes that take several steps to pay off.

[…]

“Crack users and heroin users are so disorganized and get in these frantic binges, they’re not going to sit still and do anything in an organized way for very long,” Dr. Rawson said. “Meth users, on the other hand, that’s all they have, is time. The drug stimulates the part of the brain that perseverates on things. So you get people perseverating on things, and if you sit down at a computer terminal you can go for hours and hours.”

And there’s the illegal alien tie-in:

“Look at the states that have the highest rates of identity theft—Arizona, Nevada, California, Texas and Colorado,’’ Mr. Morales said. “The two things they all have in common are illegal immigration and meth.”

I have no idea if any of this is actually true. But I do know if the drug user-identity thief connection story has legs, Congress is likely to start paying much closer attention.

Posted on July 12, 2006 at 1:32 PM • View Comments

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Sidebar photo of Bruce Schneier by Joe MacInnis.