Latest Essays
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Information Attacks on Democracies
Democracy is an information system.
That’s the starting place of our new paper: “Common-Knowledge Attacks on Democracy.” In it, we look at democracy through the lens of information security, trying to understand the current waves of Internet disinformation attacks. Specifically, we wanted to explain why the same disinformation campaigns that act as a stabilizing influence in Russia are destabilizing in the United States.
The answer revolves around the different ways autocracies and democracies work as information systems. We start by differentiating between two types of knowledge that societies use in their political systems. The first is …
We Need Stronger Cybersecurity Laws for the Internet of Things
Due to ever-evolving technological advances, manufacturers are connecting consumer goods—from toys to lightbulbs to major appliances—to the internet at breakneck speeds. This is the Internet of Things, and it’s a security nightmare.
The Internet of Things fuses products with communications technology to make daily life more effortless. Think Amazon’s Alexa, which not only answers questions and plays music but allows you to control your home’s lights and thermostat. Or the current generation of implanted pacemakers, which can both receive commands and send information to doctors over the internet…
Nobody’s Cellphone Is Really That Secure
But most of us aren’t the president of the United States.
Earlier this week, The New York Times reported that the Russians and the Chinese were eavesdropping on President Donald Trump’s personal cellphone and using the information gleaned to better influence his behavior. This should surprise no one. Security experts have been talking about the potential security vulnerabilities in Trump’s cellphone use since he became president. And President Barack Obama bristled at—but acquiesced to—the security rules prohibiting him from using a “regular” cellphone throughout his presidency.
Three broader questions obviously emerge from the story. Who else is listening in on Trump’s cellphone calls? What about the cellphones of other world leaders and senior government officials? And—most personal of all—what about …
Internet Hacking Is About to Get Much Worse
We can no longer leave online security to the market.
It’s no secret that computers are insecure. Stories like the recent Facebook hack, the Equifax hack and the hacking of government agencies are remarkable for how unremarkable they really are. They might make headlines for a few days, but they’re just the newsworthy tip of a very large iceberg.
The risks are about to get worse, because computers are being embedded into physical devices and will affect lives, not just our data. Security is not a problem the market will solve. The government needs to step in and regulate this increasingly dangerous space…
Cryptography after the Aliens Land
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Quantum computing is a new way of computing—one that could allow humankind to perform computations that are simply impossible using today’s computing technologies. It allows for very fast searching, something that would break some of the encryption algorithms we use today. And it allows us to easily factor large numbers, something that would break the RSA cryptosystem for any key length.
This is why cryptographers are hard at work designing and analyzing “quantum-resistant” public-key algorithms. Currently, quantum computing is too nascent for cryptographers to be sure of what is secure and what isn’t. But even assuming aliens have developed the technology to its full potential, quantum computing doesn’t spell the end of the world for cryptography. Symmetric cryptography is easy to make quantum-resistant, and we’re working on quantum-resistant public-key algorithms. If public-key cryptography ends up being a temporary anomaly based on our mathematical knowledge and computational ability, we’ll still survive. And if some inconceivable alien technology can break all of cryptography, we still can have secrecy based on information theory—albeit with significant loss of capability…
Don't Fear the TSA Cutting Airport Security. Be Glad That They’re Talking about It.
Last week, CNN reported that the Transportation Security Administration is considering eliminating security at U.S. airports that fly only smaller planes—60 seats or fewer. Passengers connecting to larger planes would clear security at their destinations.
To be clear, the TSA has put forth no concrete proposal. The internal agency working group’s report obtained by CNN contains no recommendations. It’s nothing more than 20 people examining the potential security risks of the policy change. It’s not even new: The TSA considered this back in 2011, and the agency reviews its security policies every year. But commentary around the news has been …
Censorship in the Age of Large Cloud Providers
Internet censors have a new strategy in their bid to block applications and websites: pressuring the large cloud providers that host them. These providers have concerns that are much broader than the targets of censorship efforts, so they have the choice of either standing up to the censors or capitulating in order to maximize their business. Today’s internet largely reflects the dominance of a handful of companies behind the cloud services, search engines and mobile platforms that underpin the technology landscape. This new centralization radically tips the balance between those who want to censor parts of the internet and those trying to evade censorship. When the profitable answer is for a software giant to acquiesce to censors’ demands, how long can internet freedom last?…
Why the FBI Wants You to Reboot Your Router—and Why That Won’t Be Enough Next Time
The security threats will keep getting worse.
On May 25, the FBI asked us all to reboot our routers. The story behind this request is one of sophisticated malware and unsophisticated home-network security, and it’s a harbinger of the sorts of pervasive threats—from nation-states, criminals and hackers—that we should expect in coming years.
VPNFilter is a sophisticated piece of malware that infects mostly older home and small-office routers made by Linksys, MikroTik, Netgear, QNAP and TP-Link. (For a list of specific models, click here.) It’s an impressive piece of work. It can eavesdrop on traffic passing through the router—specifically, log-in credentials and SCADA traffic, which is a networking protocol that controls power plants, chemical plants and industrial systems—attack other targets on the Internet and destructively “kill” its infected device. It is one of a very few pieces of malware that can survive a reboot, even though that’s what the FBI has requested. It has a number of other capabilities, and it can be remotely updated to provide still others. More than 500,000 routers in at least 54 countries have been infected since 2016…
Data Protection Laws Are Shining a Needed Light on a Secretive Industry
When Marc Zuckerberg testified before both the House and the Senate last month, it became immediately obvious that few US lawmakers had any appetite to regulate the pervasive surveillance taking place on the internet.
Right now, the only way we can force these companies to take our privacy more seriously is through the market. But the market is broken. First, none of us do business directly with these data brokers. Equifax might have lost my personal data in 2017, but I can’t fire them because I’m not their customer or even their user. I could complain to the companies I do business with who sell my data to Equifax, but I don’t know who they are. Markets require voluntary exchange to work properly. If consumers don’t even know where these data brokers are getting their data from and what they’re doing with it, they can’t make intelligent buying choices…
What "Efail" Tells Us About Email Vulnerabilities and Disclosure
Last week, researchers disclosed vulnerabilities in a large number of encrypted email clients: specifically, those that use OpenPGP and S/MIME, including Thunderbird and AppleMail. These are serious vulnerabilities: An attacker who can alter mail sent to a vulnerable client can trick that client into sending a copy of the plaintext to a web server controlled by that attacker. The story of these vulnerabilities and the tale of how they were disclosed illustrate some important lessons about security vulnerabilities in general and email security in particular…
Sidebar photo of Bruce Schneier by Joe MacInnis.