Entries Tagged "cameras"

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Camera that Sees Under Clothes

Interesting:

A British company has developed a camera that can detect weapons, drugs or explosives hidden under people’s clothes from up to 25 meters away in what could be a breakthrough for the security industry.

The T5000 camera, created by a company called ThruVision, uses what it calls “passive imaging technology” to identify objects by the natural electromagnetic rays—known as Terahertz or T-rays—that they emit.

The high-powered camera can detect hidden objects from up to 80 feet away and is effective even when people are moving. It does not reveal physical body details and the screening is harmless, the company says.

If this is real, it seems much less invasive than backscatter X ray.

Posted on March 17, 2008 at 6:30 AM • View Comments

Privacy and Power

When I write and speak about privacy, I am regularly confronted with the mutual disclosure argument. Explained in books like David Brin’s The Transparent Society, the argument goes something like this: In a world of ubiquitous surveillance, you’ll know all about me, but I will also know all about you. The government will be watching us, but we’ll also be watching the government. This is different than before, but it’s not automatically worse. And because I know your secrets, you can’t use my secrets as a weapon against me.

This might not be everybody’s idea of utopia—and it certainly doesn’t address the inherent value of privacy—but this theory has a glossy appeal, and could easily be mistaken for a way out of the problem of technology’s continuing erosion of privacy. Except it doesn’t work, because it ignores the crucial dissimilarity of power.

You cannot evaluate the value of privacy and disclosure unless you account for the relative power levels of the discloser and the disclosee.

If I disclose information to you, your power with respect to me increases. One way to address this power imbalance is for you to similarly disclose information to me. We both have less privacy, but the balance of power is maintained. But this mechanism fails utterly if you and I have different power levels to begin with.

An example will make this clearer. You’re stopped by a police officer, who demands to see identification. Divulging your identity will give the officer enormous power over you: He or she can search police databases using the information on your ID; he or she can create a police record attached to your name; he or she can put you on this or that secret terrorist watch list. Asking to see the officer’s ID in return gives you no comparable power over him or her. The power imbalance is too great, and mutual disclosure does not make it OK.

You can think of your existing power as the exponent in an equation that determines the value, to you, of more information. The more power you have, the more additional power you derive from the new data.

Another example: When your doctor says “take off your clothes,” it makes no sense for you to say, “You first, doc.” The two of you are not engaging in an interaction of equals.

This is the principle that should guide decision-makers when they consider installing surveillance cameras or launching data-mining programs. It’s not enough to open the efforts to public scrutiny. All aspects of government work best when the relative power between the governors and the governed remains as small as possible—when liberty is high and control is low. Forced openness in government reduces the relative power differential between the two, and is generally good. Forced openness in laypeople increases the relative power, and is generally bad.

Seventeen-year-old Erik Crespo was arrested in 2005 in connection with a shooting in a New York City elevator. There’s no question that he committed the shooting; it was captured on surveillance-camera videotape. But he claimed that while being interrogated, Detective Christopher Perino tried to talk him out of getting a lawyer, and told him that he had to sign a confession before he could see a judge.

Perino denied, under oath, that he ever questioned Crespo. But Crespo had received an MP3 player as a Christmas gift, and surreptitiously recorded the questioning. The defense brought a transcript and CD into evidence. Shortly thereafter, the prosecution offered Crespo a better deal than originally proffered (seven years rather than 15). Crespo took the deal, and Perino was separately indicted on charges of perjury.

Without that recording, it was the detective’s word against Crespo’s. And who would believe a murder suspect over a New York City detective? That power imbalance was reduced only because Crespo was smart enough to press the “record” button on his MP3 player. Why aren’t all interrogations recorded? Why don’t defendants have the right to those recordings, just as they have the right to an attorney? Police routinely record traffic stops from their squad cars for their own protection; that video record shouldn’t stop once the suspect is no longer a threat.

Cameras make sense when trained on police, and in offices where lawmakers meet with lobbyists, and wherever government officials wield power over the people. Open-government laws, giving the public access to government records and meetings of governmental bodies, also make sense. These all foster liberty.

Ubiquitous surveillance programs that affect everyone without probable cause or warrant, like the National Security Agency’s warrantless eavesdropping programs or various proposals to monitor everything on the internet, foster control. And no one is safer in a political system of control.

This essay originally appeared on Wired.com.

Commentary by David Brin.

Posted on March 11, 2008 at 6:09 AM • View Comments

Improvements in Face Recognition

Ignore the laughable “100% accurate” claim; this is an interesting idea:

Mike Burton, Professor of Psychology at Glasgow, and lecturer Rob Jenkins say they achieved their hugely-improved results by eliminating the variable effects of age, hairstyle, expression, lighting, different camera equipment etc. This was done by producing a composite “average face” for a person, synthesised from twenty different pictures across a range of ages, lighting and so on.

Not useful when you only have one grainy photograph of your target, but interesting research nonetheless.

Posted on February 11, 2008 at 7:18 AM • View Comments

Cameras in the New York City Subways

An update:

New York City’s plan to secure its subways with a next-generation surveillance network is getting more expensive by the second, and slipping further and further behind schedule. A new report by the New York State Comptroller’s office reveals that “the cost of the electronic security program has grown from $265 million to $450 million, an increase of $185 million or 70 percent.” An August 2008 deadline has been pushed back to December 2009, and further delays may be just ahead.

[…]

I’ve spent the last few months, on and off, reporting on New York’s counter-terror programs for the magazine. One major problem with the subway surveillance program has been wedging a modern security network into a 5,000 square-mile system that recently celebrated its hundredth birthday. Getting the power ­ and air-conditioning ­ needed for the cameras’ servers has been a nightmare. In many stations, there’s literally no place to put the things. Plus, the ceilings in most of the subway stations are only nine feet high, and there are columns every few yards. Which makes it very hard to get a good look at the passengers.

Posted on January 25, 2008 at 1:41 PM • View Comments

How Well "See Something, Say Something" Actually Works

I’ve written about the “War on the Unexpected,” and how normal people can’t figure out what’s an actual threat and what isn’t:

All they know is that something makes them uneasy, usually based on fear, media hype, or just something being different.

[…]

If you ask amateurs to act as front-line security personnel, you shouldn’t be surprised when you get amateur security.

Yesterday The New York Times wrote about New York City’s campaign:

Now, an overview of police data relating to calls to the hot line over the past two years reveals the answer and provides a unique snapshot of post-9/11 New York, part paranoia and part well-founded caution. Indeed, no terrorists were arrested, but a wide spectrum of other activity was reported.

[…]

In all, the hot line received 8,999 calls in 2006, including calls that were transferred from 911 and the 311 help line, Mr. Browne said. They included a significant number of calls about suspicious packages, many in the transit system. Most involved backpacks, briefcases or other items accidentally left behind by their owners. None of them, Mr. Browne said, were bombs.

There were, however, 816 calls to the hot line in 2006 that were deemed serious enough to require investigation by the department’s intelligence division or its joint terrorism task force with the F.B.I. Mr. Browne said that 109 of those calls had a connection to the transit system and included reports of suspicious people in tunnels and yards, and of people taking pictures of the tracks.

The hot line received many more calls in 2007, possibly because of the authority’s advertising campaign, Mr. Browne said. Through early December, the counterterrorism hot line received 13,473 calls, with 644 of those meriting investigation. Of that group, 45 calls were transit related.

Then there were the 11 calls about people counting.

Mr. Browne said several callers reported seeing men clicking hand-held counting devices while riding on subway trains or waiting on platforms.

The callers said that the men appeared to be Muslims and that they seemed to be counting the number of people boarding subway trains or the number of trains passing through a station. They feared the men might be collecting data to maximize the casualties in a terror attack.

But when the police looked into the claims, they determined that the men were counting prayers with the devices, essentially a modern version of rosary beads.

None of those calls led to arrests, but several others did. At least three calls resulted in arrests for trying to sell false identification, including driver’s licenses and Social Security cards. One informer told the police about a Staten Island man who was later found to have a cache of firearms. A Queens man was charged with having an illegal gun and with unlawful dealing in fireworks.

A Brooklyn man was charged with making anti-Semitic threats against his landlord and threatening to use sarin gas on him. At least two men arrested on tips from the hot line were turned over to immigration officials for deportation, Mr. Browne said.

And as long as we’re on the topic, read about the couple branded as terrorists in the UK for taking photographs in a mall. And this about a rail fan being branded a terrorist for trying to film a train. (Note that the member of the train’s crew was trying to incite the other passengers to do something about the filmer.) And about this Icelandic woman’s experience with U.S. customs because she overstayed a visa in 1995.

And lastly, this funny piece of (I trust) fiction.

Remember that every one of these incidents requires police resources to investigate, resources that almost certainly could be better spent keeping us actually safe.

Refuse to be terrorized!

Posted on January 8, 2008 at 7:53 AM • View Comments

Secretly Recording Interrogations

It’s getting easier to watch the watchers:

A teen suspect’s snap decision to secretly record his interrogation with an MP3 player has resulted in a perjury case against a veteran detective and a plea deal for the teen.

Unaware of the recording, Detective Christopher Perino insisted under oath at a trial in April that suspect Erik Crespo wasn’t questioned about a shooting in the Bronx.

But the defense confronted the detective with a transcript it said proved he had spent more than an hour unsuccessfully trying to persuade Crespo to confess.

Perino was arraigned today on 12 counts of first-degree perjury and freed on bail.

My guess is that this sort of perjury occurs more than we realize. If there’s one place I think cameras should be rolling at all times, it’s in police station interrogation rooms. And no erasing the tapes either. (And those tapes must have been really damning. Old interrogation tapes can yield valuable intelligence; you don’t ever erase them unless you absolutely have to.)

Posted on December 11, 2007 at 12:26 PM • View Comments

Taking Pictures from a Train

This is a very moving story about a foreign tourist being removed from a train for taking pictures:

The train is a half hour west of New Haven when the conductor, having finished her original rounds, reappears. She moves down the aisle, looks, stops between our seats, faces the person taking pictures. “Sir, in the interest of national security, we do not allow pictures to be taken of or from this train.” He starts, “I…….” but, without English, his response trails off into silence. The conductor, speaking louder, forcefully: “Sir, I will confiscate that camera if you don’t put it away.” Again, little response. “Sir, this is a security matter! We cannot allow pictures.” She turns away abruptly and, as she moves down the aisle, calls over her shoulder, in a very loud voice, “Put. It. Away!” He packs his camera.

Within a minute after our arrival in New Haven, two armed police officers entered the car, approached my neighbor’s seat. “Sir, we’re removing you from this train.” “I….;” “I……” “Sir, you have breached security regulations. We must remove you from this train.” “I…,” “I…..” “Sir, we are not going to delay this train because of you. You will get off, or we will remove you physically.” “I…..”

Nearby passengers stir. One says, “It’s obvious he doesn’t speak English. There are people here who speak more than one language. Perhaps we can help.” Different ones ask about the traveler’s language; learn he speaks Japanese. For me, a sudden flash of memory—a student at International Christian University in Japan, I took countless pictures without arousing suspicion.

The police speak through the interpreter, with the impatience of authority. “The conductor asked this man three times to discontinue. We must remove him from the train.” The traveler hears the translation, is befuddled. Hidden beneath the commotion is a cross-cultural drama. With the appearance of police officers, this quiet visitor is embarrassed to find he is the center of attention. The officers explain, “After we remove him from the train, when we are through our investigation, we will put him on the next train.” The woman translates. The passenger replies, “I’m meeting relatives in Boston. They cannot be reached by phone. They expect me and will be worried when I do not arrive on schedule.” “Our task,” the police repeat, “is to remove you from this train. If necessary, we will do so by force. After we have finished the investigation, we’ll put you on another train.” The woman translates. The traveler gathers his belongings and departs.

My earlier suggestion that you imagine being in his place leaves you free to respond and draw your conclusions. Remember: you’ve been removed from the train, are being interrogated, perhaps having your equipment confiscated; while I continue to do what I take for granted ­ traveling unimpeded, on to Providence.

The more I replay the scene, the more troublesome it is. It is the stuff of nightmares. Relations between people and countries lie at the heart of the issue. The abstract terms that inform political and social debate appear, as if in person, unexpectedly, near enough to hear, touch, feel. Taking no position is not an option. As an educator, I would prepare and deliver a lecture on how others perceive America in the world community, then seek an audience. I’ll spare you. But—I just watched armed police officers remove a visitor from the train for taking pictures. I don’t understand this. I’m disturbed ­ no, shaken ­ to bear witness to these events.

EDITED TO ADD (11/13): A response from the writer of the original article, after people questioned the veracity of the story.

Posted on November 8, 2007 at 1:53 PM • View Comments

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Sidebar photo of Bruce Schneier by Joe MacInnis.