Essays in the Category "Privacy and Surveillance"
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Why Obama Should Keep His BlackBerry—But Won't
When he becomes president, Barack Obama will have to give up his BlackBerry. Aides are concerned that his unofficial conversations would become part of the presidential record, subject to subpoena and eventually made public as part of the country’s historical record.
This reality of the information age might be particularly stark for the president, but it’s no less true for all of us. Conversation used to be ephemeral. Whether face-to-face or by phone, we could be reasonably sure that what we said disappeared as soon as we said it. Organized crime bosses worried about phone taps and room bugs, but that was the exception. Privacy was just assumed…
CCTV Doesn't Keep Us Safe, Yet the Cameras Are Everywhere
Pervasive security cameras don’t substantially reduce crime. There are exceptions, of course, and that’s what gets the press. Most famously, CCTV cameras helped catch James Bulger’s murderers in 1993. And earlier this year, they helped convict Steve Wright of murdering five women in the Ipswich area. But these are the well-publicised exceptions. Overall, CCTV cameras aren’t very effective.
This fact has been demonstrated again and again: by a comprehensive study for the Home Office in 2005, by several studies in the US, and again with new data …
Crossing Borders with Laptops and PDAs
Last month a US court ruled that border agents can search your laptop, or any other electronic device, when you’re entering the country. They can take your computer and download its entire contents, or keep it for several days. Customs and Border Patrol has not published any rules regarding this practice, and I and others have written a letter to Congress urging it to investigate and regulate this practice.
But the US is not alone. British customs agents search laptops for pornography. And there are reports on the internet of this sort of thing happening at other borders, too. You might not like it, but it’s a fact. So how do you protect yourself?…
Our Data, Ourselves
Dutch version by Jeroen van der Ham
In the information age, we all have a data shadow.
We leave data everywhere we go. It’s not just our bank accounts and stock portfolios, or our itemized bills, listing every credit card purchase and telephone call we make. It’s automatic road-toll collection systems, supermarket affinity cards, ATMs and so on.
It’s also our lives. Our love letters and friendly chat. Our personal e-mails and SMS messages. Our business plans, strategies and offhand conversations. Our political leanings and positions. And this is just the data we interact with. We all have shadow selves living in the data banks of hundreds of corporations’ information brokers—information about us that is both surprisingly personal and uncannily complete—except for the errors that you can neither see nor correct…
The Myth of the "Transparent Society"
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 …
What Our Top Spy Doesn't Get: Security and Privacy Aren't Opposites
If there’s a debate that sums up post-9/11 politics, it’s security versus privacy. Which is more important? How much privacy are you willing to give up for security? Can we even afford privacy in this age of insecurity? Security versus privacy: It’s the battle of the century, or at least its first decade.
In a Jan. 21 New Yorker article, Director of National Intelligence Michael McConnell discusses a proposed plan to monitor all—that’s right, all—internet communications for security purposes, an idea so extreme that the word “Orwellian” feels too mild…
Why "Anonymous" Data Sometimes Isn't
Last year, Netflix published 10 million movie rankings by 500,000 customers, as part of a challenge for people to come up with better recommendation systems than the one the company was using. The data was anonymized by removing personal details and replacing names with random numbers, to protect the privacy of the recommenders.
Arvind Narayanan and Vitaly Shmatikov, researchers at the University of Texas at Austin, de-anonymized some of the Netflix data by comparing rankings and timestamps with public information in the Internet Movie Database…
How Does Bruce Schneier Protect His Laptop Data? With His Fists—and PGP
Computer security is hard. Software, computer and network security are all ongoing battles between attacker and defender. And in many cases the attacker has an inherent advantage: He only has to find one network flaw, while the defender has to find and fix every flaw.
Cryptography is an exception. As long as you don’t write your own algorithm, secure encryption is easy. And the defender has an inherent mathematical advantage: Longer keys increase the amount of work the defender has to do linearly, while geometrically increasing the amount of work the attacker has to do…
Lesson From Tor Hack: Anonymity and Privacy Aren't the Same
As the name implies, Alcoholics Anonymous meetings are anonymous. You don’t have to sign anything, show ID or even reveal your real name. But the meetings are not private. Anyone is free to attend. And anyone is free to recognize you: by your face, by your voice, by the stories you tell. Anonymity is not the same as privacy.
That’s obvious and uninteresting, but many of us seem to forget it when we’re on a computer. We think “it’s secure,” and forget that secure can mean many different things.
Tor is a free tool that allows people to use the internet anonymously. Basically, by joining Tor you join a network of computers around the world that pass internet traffic randomly amongst each other before sending it out to wherever it is going. Imagine a tight huddle of people passing letters around. Once in a while a letter leaves the huddle, sent off to some destination. If you can’t see what’s going on inside the huddle, you can’t tell who sent what letter based on watching letters leave the huddle…
Strong Laws, Smart Tech Can Stop Abusive 'Data Reuse'
We learned the news in March: Contrary to decades of denials, the U.S. Census Bureau used individual records to round up Japanese-Americans during World War II.
The Census Bureau normally is prohibited by law from revealing data that could be linked to specific individuals; the law exists to encourage people to answer census questions accurately and without fear. And while the Second War Powers Act of 1942 temporarily suspended that protection in order to locate Japanese-Americans, the Census Bureau had maintained that it only provided general information about neighborhoods…
Sidebar photo of Bruce Schneier by Joe MacInnis.