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Trust is the lifeblood of the Internet and central to everything that is done here. In order for the current 3.5 billion users to continue using the Internet and its services, and for the next billion users to connect to the Internet, trust is required. The importance of trust is seen even more in Africa where, though there is a high growth of Internet users, the e-commerce uptake rate is very low. Users are very reluctant to carry out financial transactions over the Internet because of fear of being attacked by cybercriminals. more
There's a lot of misunderstanding about blockchain. A recent study by HSBC, for example, found that 59 percent of customers around the world had never heard of it. Yet, while that alone is quite telling, it's probably more alarming to consider the fact that very same poll revealed that 80 percent of people who had hard of blockchain did not understand what it is. This level of confusion isn't confined to the general population either. more
This post was co-authored by Yixin Sun, Annie Edmundson, Henry Birge-Lee, Jennifer Rexford, and Prateek Mittal. In this post, we discuss a recent thread of research that highlights the insecurity of Internet services due to the underlying insecurity of Internet routing. We hope that this thread facilitates important dialog in the networking, security, and Internet policy communities to drive change and adoption of secure mechanisms for Internet routing. more
Security for Internet-connected devices, the "Internet of Things" (IoT), is critically important. Now, more than ever, it is top of mind for device manufacturers, network operators, consumer advocates, lawmakers, and government regulators -- domestically and internationally. In the face of recent attacks, government authorities and consumer advocates have proposed legislation, frameworks, certifications, and labeling schemes. more
For decades, academics and technologists have sparred with the government over access to crypographic technology. In the 1970s, when crypto started to become an academic discipline, the NSA was worried, fearing that they'd lose the ability to read other countries' traffic. And they acted. For example, they exerted pressure to weaken DES... The Second Crypto War, in the 1990s, is better known today, with the battles over the Clipper Chip, export rules, etc. more
In October of 2016 the Mirai botnet came thundering onto the internet landscape. A digital Godzilla, a DDoS King Kong, this Internet of Things-powered behemoth began smashing DDoS attack records, online powerhouses like Reddit, Etsy, Spotify, CNN and the New York Times crumbling under its fists. When the dust had settled, and services had been restored, one thing seemed certain: a new era of DDoS attacks was upon us. Mirai was terrifying as a botnet but even worse as a harbinger. more
On 23 February, the U.S. Administration had the chutzpah to file a formal communication to the World Trade Organization (WTO) complaining about "measures adopted and under development by China relating to its cybersecurity law." However, it is the U.S. complaint that is most troubling. Here is why. The gist of the U.S. complaint is that China's newly promulgated directive on the use of VPN (Virtual Private Network) encrypted circuits from foreign nations runs afoul of... more
Reflection amplification is a technique that allows cyber attackers to both magnify the amount of malicious traffic they can generate, and obfuscate the sources of that attack traffic. For the past five years, this combination has been irresistible to attackers, and for good reason. This simple capability, of turning small requests into larger, 'amplified' responses, changed the Distributed Denial of Service (DDoS) attack landscape dramatically. more
A Twitter thread on trolls brought up mention of trolls on Usenet. The reason they were so hard to deal with, even then, has some lessons for today; besides, the history is interesting. (Aside: this is, I think, the first longish thing I've ever written about any of the early design decisions for Usenet. I should note that this is entirely my writing, and memory can play many tricks across nearly 40 years.) more
I don't (and probably won't) have anything substantive to say about the technical details of the just-announced Meltdown and Spectre attacks. What I do want to stress is that these show, yet again, that security is a systems property: being secure requires that every component, including ones you've never heard of, be secure. These attacks depend on hardware features... and no, many computer programmers don't know what those are, either. more
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