TSA Backscatter X-ray Backlash

Some of Bruce Schneier's stream of consciousness on the topic.

Amplify’d from www.schneier.com

A woman has a horrific story of opting-out of the full body scanners. More stories: this one about the TSA patting down a screaming toddler. And here's Dave Berry's encounter (also this NPR interview.

Sadly, I agree with this:

It is no accident that women have been complaining about being pulled out of line because of their big breasts, having their bodies commented on by TSA officials, and getting inappropriate touching when selected for pat-downs for nearly 10 years now, but just this week it went viral. It is no accident that CAIR identified Islamic head scarves (hijab) as an automatic trigger for extra screenings in January, but just this week it went viral. What was different? Suddenly an able-bodied white man is the one who was complaining

This video provides tips to parents flying with young children. Around 2:50 in, the reporter indicates that you can find out if your child has been pre-selected for secondary, and then recommends requesting "de-selection." That doesn't make sense.

Nor this story. The author convinces people on line to opt-out with him. After the first four opt-outs, the TSA just sent people through the metal detectors.

There's talk about the health risks of the machines, but I can't believe you won't get more radiation on the flight. Here's some data:

A typical dental X-ray exposes the patient to about 2 millirems of radiation. According to one widely cited estimate, exposing each of 10,000 people to one rem (that is, 1,000 millirems) of radiation will likely lead to 8 excess cancer deaths. Using our assumption of linearity, that means that exposure to the 2 millirems of a typical dental X-ray would lead an individual to have an increased risk of dying from cancer of 16 hundred-thousandths of one percent. Given that very small risk, it is easy to see why most rational people would choose to undergo dental X-rays every few years to protect their teeth. More importantly for our purposes, assuming that the radiation in a backscatter X-ray is about a hundredth the dose of a dental X-ray, we find that a backscatter X-ray increases the odds of dying from cancer by about 16 ten millionths of one percent. That suggests that for every billion passengers screened with backscatter radiation, about 16 will die from cancer as a result.

Jeffrey Goldberg asked me which I would rather see for children: backscatter X-ray or enhanced pat down. After remarking what an icky choice it was, I opted for the X-ray; it's less traumatic.

In 2005, I wrote:

I'm not impressed with this security trade-off. Yes, backscatter X-ray machines might be able to detect things that conventional screening might miss. But I already think we're spending too much effort screening airplane passengers at the expense of screening luggage and airport employees...to say nothing of the money we should be spending on non-airport security. On the other side, these machines are expensive and the technology is incredibly intrusive. I don't think that people should be subjected to strip searches before they board airplanes. And I believe that most people would be appalled by the prospect of security screeners seeing them naked. I believe that there will be a groundswell of popular opposition to this idea. Aside from the usual list of pro-privacy and pro-liberty groups, I expect fundamentalist Christian groups to be appalled by this technology. I think we can get a bevy of supermodels to speak out against the invasiveness of the search.

Exactly two things have made airline travel safer since 9/11: reinforcement of cockpit doors, and passengers who now know that they may have to fight back. Everything else -- Secure Flight and Trusted Traveler included -- is security theater. We would all be a lot safer if, instead, we implemented enhanced baggage security -- both ensuring that a passenger's bags don't fly unless he does, and explosives screening for all baggage -- as well as background checks and increased screening for airport employees. Then we could take all the money we save and apply it to intelligence, investigation and emergency response. These are security measures that pay dividends regardless of what the terrorists are planning next, whether it's the movie plot threat of the moment, or something entirely different. Read more at www.schneier.com

 

See this Amp at http://amplify.com/u/fn8j