Entries Tagged "censorship"

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IT for Oppression

I’ve been thinking a lot about how information technology, and the Internet in particular, is becoming a tool for oppressive governments. As Evgeny Morozov describes in his great book The Net Delusion: The Dark Side of Internet Freedom, repressive regimes all over the world are using the Internet to more efficiently implement surveillance, censorship, and propaganda. And they’re getting really good at it.

For a lot of us who imagined that the Internet would spark an inevitable wave of Internet freedom, this has come as a bit of a surprise. But it turns out that information technology is not just a tool for freedom-fighting rebels under oppressive governments, it’s also a tool for those oppressive governments. Basically, IT magnifies power; the more power you have, the more it can be magnified in IT.

I think we got this wrong—anyone remember John Perry Barlow’s 1996 manifesto?—because, like most technologies, IT technologies are first used by the more agile individuals and groups outside the formal power structures. In the same way criminals can make use of a technological innovation faster than the police can, dissidents in countries all over the world were able to make use of Internet technologies faster than governments could. Unfortunately, and inevitably, governments have caught up.

This is the “security gap” I talk about in the closing chapters of Liars and Outliers.

I thought about all these things as I read this article on how the Syrian government hacked into the computers of dissidents:

The cyberwar in Syria began with a feint. On Feb. 8, 2011, just as the Arab Spring was reaching a crescendo, the government in Damascus suddenly reversed a long-standing ban on websites such as Facebook, Twitter, YouTube, and the Arabic version of Wikipedia. It was an odd move for a regime known for heavy-handed censorship; before the uprising, police regularly arrested bloggers and raided Internet cafes. And it came at an odd time. Less than a month earlier demonstrators in Tunisia, organizing themselves using social networking services, forced their president to flee the country after 23 years in office. Protesters in Egypt used the same tools to stage protests that ultimately led to the end of Hosni Mubarak’s 30-year rule. The outgoing regimes in both countries deployed riot police and thugs and tried desperately to block the websites and accounts affiliated with the revolutionaries. For a time, Egypt turned off the Internet altogether.

Syria, however, seemed to be taking the opposite tack. Just as protesters were casting about for the means with which to organize and broadcast their messages, the government appeared to be handing them the keys.

[…]

The first documented attack in the Syrian cyberwar took place in early May 2011, some two months after the start of the uprising. It was a clumsy one. Users who tried to access Facebook in Syria were presented with a fake security certificate that triggered a warning on most browsers. People who ignored it and logged in would be giving up their user name and password, and with them, their private messages and contacts.

I dislike this being called a “cyberwar,” but that’s my only complaint with the article.

There are no easy solutions here, especially because technologies that defend against one of those three things—surveillance, censorship, and propaganda—often make one of the others easier. But this is an important problem to solve if we want the Internet to be a vehicle of freedom and not control.

EDITED TO ADD (12/13): This is a good 90-minute talk about how governments have tried to block Tor.

Posted on November 30, 2012 at 5:23 AM • View Comments

Blue Coat Products Enable Web Censorship in Syria

It’s illegal for Blue Coat to sell its technology for this purpose, but there are lots of third-parties who are willing to act as middlemen:

“Blue Coat does not sell to Syria. We comply with US export laws and we do not allow our partners to sell to embargoed countries,” [Blue Coat spokesman Steve] Schick told the Bureau. “In addition, we do not allow any of our resellers, regardless of their location in the world, to sell to an embargoed country, such as Syria.”

However, Schick did not rule out the possibility that the equipment could have been bought via a third party re-seller, noting that Blue Coat equipment can be found on websites like eBay.

Bet you anything that the Syrian Blue Coat products are registered, and that they receive all the normal code and filter updates.

EDITED TO ADD (11/14): The Wall Street Journal confirms it:

The appliances do have Blue Coat service and support contracts. The company says it has now cut off contracts for the devices.

Posted on October 24, 2011 at 1:39 PM • View Comments

Tor Arms Race

Iran blocks Tor, and Tor releases a workaround on the same day.

How did the filter work technically? Tor tries to make its traffic look like a web browser talking to an https web server, but if you look carefully enough you can tell some differences. In this case, the characteristic of Tor’s SSL handshake they looked at was the expiry time for our SSL session certificates: we rotate the session certificates every two hours, whereas normal SSL certificates you get from a certificate authority typically last a year or more. The fix was to simply write a larger expiration time on the certificates, so our certs have more plausible expiry times.

Posted on September 26, 2011 at 6:41 AM • View Comments

Telex Anti-Censorship System

This is really clever:

Many anticensorship systems work by making an encrypted connection (called a “tunnel”) from the user’s computer to a trusted proxy server located outside the censor’s network. This server relays requests to censored websites and returns the responses to the user over the encrypted tunnel. This approach leads to a cat-and-mouse game, where the censor attempts to discover and block the proxy servers. Users need to learn the address and login information for a proxy server somehow, and it’s very difficult to broadcast this information to a large number of users without the censor also learning it.

Telex turns this approach on its head to create what is essentially a proxy server without an IP address. In fact, users don’t need to know any secrets to connect. The user installs a Telex client app (perhaps by downloading it from an intermittently available website or by making a copy from a friend). When the user wants to visit a blacklisted site, the client establishes an encrypted HTTPS connection to a non-blacklisted web server outside the censor’s network, which could be a normal site that the user regularly visits. Since the connection looks normal, the censor allows it, but this connection is only a decoy.

The client secretly marks the connection as a Telex request by inserting a cryptographic tag into the headers. We construct this tag using a mechanism called public-key steganography. This means anyone can tag a connection using only publicly available information, but only the Telex service (using a private key) can recognize that a connection has been tagged.

As the connection travels over the Internet en route to the non-blacklisted site, it passes through routers at various ISPs in the core of the network. We envision that some of these ISPs would deploy equipment we call Telex stations. These devices hold a private key that lets them recognize tagged connections from Telex clients and decrypt these HTTPS connections. The stations then divert the connections to anti­censorship services, such as proxy servers or Tor entry points, which clients can use to access blocked sites. This creates an encrypted tunnel between the Telex user and Telex station at the ISP, redirecting connections to any site on the Internet.

EDITED TO ADD (8/1): Another article.

EDITED TO ADD (8/13): Another article.

Posted on July 19, 2011 at 9:59 AM • View Comments

Details Removed from Book at Request of U.S. Department of Defense

From the AFP:

A publisher has agreed to remove US intelligence details from a memoir by a former army officer in Afghanistan after the Pentagon raised last-minute objections, officials said Friday.

The book, “Operation Dark Heart,” had been printed and prepared for release in August but St. Martin’s Press will now issue a revised version of the spy memoir after negotiations with the Pentagon, US and company officials said.

In an unusual step, the Defense Department has agreed to reimburse the company for the cost of the first printing, spokesman Colonel Dave Lapan told AFP.

The original manuscript “contained classified information which had not been properly reviewed” by the military and US spy agencies, he said.

St. Martin’s press will destroy copies from the first printing with Pentagon representatives observing “to ensure it’s done in accordance with our standards,” Lapan said.

The second, revised edition would be ready by the end of next week, said the author’s lawyer, Mark Zaid.

EDITED TO ADD (9/30): An analysis of the redacted material—obtained by comparing the two versions—is amusing.

Posted on September 23, 2010 at 7:19 AM • View Comments

Google vs. China

I’m not sure what I can add to this: politically motivated attacks against Gmail from China. I’ve previously written about hacking from China. Shishir Nagaraja and Ross Anderson wrote a report specifically describing how the Chinese have been hacking groups that are politically opposed to them. I’ve previously written about censorship, Chinese and otherwise. I’ve previously written about broad government eavesdropping on the Internet, Chinese and otherwise. Seems that the Chinese got in through back doors installed to facilitate government eavesdropping, which I even talked about in my essay on eavesdropping. This new attack seems to be highly sophisticated, which is no surprise.

This isn’t a new story, and I wouldn’t have mentioned it at all if it weren’t for the surreal sentence at the bottom of this paragraph:

The Google-China flap has already reignited the debate over global censorship, reinvigorating human rights groups drawing attention to abuses in the country and prompting U.S. politicians to take a hard look at trade relations. The Obama administration issued statements of support for Google, and members of Congress are pushing to revive a bill banning U.S. tech companies from working with governments that digitally spy on their citizens.

Of course, the bill won’t go anywhere, but shouldn’t someone inform those members of Congress about what’s been going on in the United States for the past eight years?

In related news, Google has enabled https by default for Gmail users. In June 2009, I cosigned a letter to the CEO of Google asking for this change. It’s a good thing.

EDITED TO ADD (1/19): Commentary on Google’s bargaining position.

Posted on January 19, 2010 at 12:45 PM • View Comments

The Problem of Vague Laws

The average American commits three felonies a day: the title of a new book by Harvey Silverglate. More specifically, the problem is the intersection of vague laws and fast-moving technology:

Technology moves so quickly we can barely keep up, and our legal system moves so slowly it can’t keep up with itself. By design, the law is built up over time by court decisions, statutes and regulations. Sometimes even criminal laws are left vague, to be defined case by case. Technology exacerbates the problem of laws so open and vague that they are hard to abide by, to the point that we have all become potential criminals.

Boston civil-liberties lawyer Harvey Silverglate calls his new book “Three Felonies a Day,” referring to the number of crimes he estimates the average American now unwittingly commits because of vague laws. New technology adds its own complexity, making innocent activity potentially criminal.

[…]

In 2001, a man named Bradford Councilman was charged in Massachusetts with violating the wiretap laws. He worked at a company that offered an online book-listing service and also acted as an Internet service provider to book dealers. As an ISP, the company routinely intercepted and copied emails as part of the process of shuttling them through the Web to recipients.

The federal wiretap laws, Mr. Silverglate writes, were “written before the dawn of the Internet, often amended, not always clear, and frequently lagging behind the whipcrack speed of technological change.” Prosecutors chose to interpret the ISP role of momentarily copying messages as they made their way through the system as akin to impermissibly listening in on communications. The case went through several rounds of litigation, with no judge making the obvious point that this is how ISPs operate. After six years, a jury found Mr. Councilman not guilty.

Other misunderstandings of the Web criminalize the exercise of First Amendment rights. A Saudi student in Idaho was charged in 2003 with offering “material support” to terrorists. He had operated Web sites for a Muslim charity that focused on normal religious training, but was prosecuted on the theory that if a user followed enough links off his site, he would find violent, anti-American comments on other sites. The Internet is a series of links, so if there’s liability for anything in an online chain, it would be hard to avoid prosecution.

EDITED TO ADD (10/12): Audio interview with Harvey Silvergate.

Posted on September 29, 2009 at 1:08 PM • View Comments

Building in Surveillance

China is the world’s most successful Internet censor. While the Great Firewall of China isn’t perfect, it effectively limits information flowing in and out of the country. But now the Chinese government is taking things one step further.

Under a requirement taking effect soon, every computer sold in China will have to contain the Green Dam Youth Escort software package. Ostensibly a pornography filter, it is government spyware that will watch every citizen on the Internet.

Green Dam has many uses. It can police a list of forbidden Web sites. It can monitor a user’s reading habits. It can even enlist the computer in some massive botnet attack, as part of a hypothetical future cyberwar.

China’s actions may be extreme, but they’re not unique. Democratic governments around the world—Sweden, Canada and the United Kingdom, for example—are rushing to pass laws giving their police new powers of Internet surveillance, in many cases requiring communications system providers to redesign products and services they sell.

Many are passing data retention laws, forcing companies to keep information on their customers. Just recently, the German government proposed giving itself the power to censor the Internet.

The United States is no exception. The 1994 CALEA law required phone companies to facilitate FBI eavesdropping, and since 2001, the NSA has built substantial eavesdropping systems in the United States. The government has repeatedly proposed Internet data retention laws, allowing surveillance into past activities as well as present.

Systems like this invite criminal appropriation and government abuse. New police powers, enacted to fight terrorism, are already used in situations of normal crime. Internet surveillance and control will be no different.

Official misuses are bad enough, but the unofficial uses worry me more. Any surveillance and control system must itself be secured. An infrastructure conducive to surveillance and control invites surveillance and control, both by the people you expect and by the people you don’t.

China’s government designed Green Dam for its own use, but it’s been subverted. Why does anyone think that criminals won’t be able to use it to steal bank account and credit card information, use it to launch other attacks, or turn it into a massive spam-sending botnet?

Why does anyone think that only authorized law enforcement will mine collected Internet data or eavesdrop on phone and IM conversations?

These risks are not theoretical. After 9/11, the National Security Agency built a surveillance infrastructure to eavesdrop on telephone calls and e-mails within the United States.

Although procedural rules stated that only non-Americans and international phone calls were to be listened to, actual practice didn’t always match those rules. NSA analysts collected more data than they were authorized to, and used the system to spy on wives, girlfriends, and famous people such as President Clinton.

But that’s not the most serious misuse of a telecommunications surveillance infrastructure. In Greece, between June 2004 and March 2005, someone wiretapped more than 100 cell phones belonging to members of the Greek government—the prime minister and the ministers of defense, foreign affairs and justice.

Ericsson built this wiretapping capability into Vodafone’s products, and enabled it only for governments that requested it. Greece wasn’t one of those governments, but someone still unknown—a rival political party? organized crime?—figured out how to surreptitiously turn the feature on.

Researchers have already found security flaws in Green Dam that would allow hackers to take over the computers. Of course there are additional flaws, and criminals are looking for them.

Surveillance infrastructure can be exported, which also aids totalitarianism around the world. Western companies like Siemens, Nokia, and Secure Computing built Iran’s surveillance infrastructure. U.S. companies helped build China’s electronic police state. Twitter’s anonymity saved the lives of Iranian dissidents—anonymity that many governments want to eliminate.

Every year brings more Internet censorship and control—not just in countries like China and Iran, but in the United States, the United Kingdom, Canada and other free countries.

The control movement is egged on by both law enforcement, trying to catch terrorists, child pornographers and other criminals, and by media companies, trying to stop file sharers.

It’s bad civic hygiene to build technologies that could someday be used to facilitate a police state. No matter what the eavesdroppers and censors say, these systems put us all at greater risk. Communications systems that have no inherent eavesdropping capabilities are more secure than systems with those capabilities built in.

This essay previously appeared—albeit with fewer links—on the Minnesota Public Radio website.

Posted on August 3, 2009 at 6:43 AM • View Comments

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Sidebar photo of Bruce Schneier by Joe MacInnis.