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IPv6 represents new territory for most Internet stakeholders, and its rollout will introduce some unique security challenges.

Cybersecurity / Featured Blogs

Crypto War III: Assurance

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

The Recent and Rapid Evolution of DDoS Attacks

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

Takeaways from the DNS-OARC's 28th Workshop

March has seen the first of the DNS Operations, Analysis, and Research Center (OARC) workshops for the year, where two days of too much DNS is just not enough! These workshops are concentrated within two days of presentations and discussions that focus exclusively on the current state of the DNS. Here are my impressions of the meeting. more

IETF and Crypto Zealots

I've been prompted to write this brief opinion piece in response to a recent article posted on CircleID by Tony Rutkowski, where he characterises the IETF as a collection of "crypto zealots." He offers the view that the IETF is behaving irresponsibly in attempting to place as much of the Internet's protocols behind session level encryption as it possibly can. ... Has the IETF got it wrong? Is there a core of crypto zealots in the IETF that are pushing an extreme agenda about encryption? more

U.S. Complaint to WTO on China VPNs Is Itself Troubling

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

1 Terabit DDoS Attacks Become a Reality; Reflecting on Five Years of Reflections

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

Humming an Open Internet Demise in London?

In mid-March, the group dubbed by Wired Magazine 20 years ago as Crypto-Rebels and Anarchists - the IETF - is meeting in London. With what is likely some loud humming, the activists will likely seek to rain mayhem upon the world of network and societal security using extreme end-to-end encryption, and collaterally diminish some remaining vestiges of an "open internet." Ironically, the IETF uses what has become known as the "NRA defence": extreme encryption doesn't cause harm, criminals and terrorists do. more

Have We Reached Peak Use of DNSSEC?

The story about securing the DNS has a rich and, in Internet terms, protracted history. The original problem statement was simple: how can you tell if the answer you get from your query to the DNS system is 'genuine' or not? The DNS alone can't help here. You ask a question and get an answer. You are trusting that the DNS has not lied to you, but that trust is not always justified. more

Usenet, Authentication, and Engineering (or: Early Design Decisions for Usenet)

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

Why Is It So Hard to Run a Bitcoin Exchange?

One of the chronic features of the Bitcoin landscape is that Bitcoin exchanges screw up and fail, starting with Mt. Gox. There's nothing conceptually very hard about running an exchange, so what's the problem? The first problem is that Bitcoin and other blockchains are by design completely unforgiving. If there is a bug in your software which lets people steal coins, too bad, nothing to be done. more