Cybersecurity

Think China Is the Highest Spamming Country? Think Again

In my department, we block about 92% of our total email (around 2.5 billion per day) at the network edge without accepting the message. When we do that, we don't see any traffic from that IP anymore and don't keep stats on it due to the overwhelming volume of mail. However, we do keep stats on mail that we block with our content filter. I decided to go and calculate how much spam we receive from each country by mapping the source IP back to its source country... more

When You Hear “Security,” Think “National Sovereignty”

These days you can hardly talk about Internet governance without hearing about security. DNSSEC is a hot issue, ICANN's new president is a cyber-security expert, and cyberattacks seem to be a daily occurrence.
This reflects a larger shift in US policy. Like the Bush administration before it, the Obama administration is making security a high priority for the US. Only now the emphasis is on security in cyberspace. The outlines of the new policy were published in the recent US Cyberspace Policy Review, which even recommends a cyber security office directly in the White House. more

Data Security: Being Open About Secrecy

It must be tricky to be an advocate of transparency when your job involves selling serious encryption tools to government departments, large and small companies, hospitals and people who are concerned about having their bank account details hijacked from a home PC. After all, the point about good encryption software and the systems that surround it is that they provide a way to keep your secrets secret, while open government and the effective regulation of financial services would seem to require the widest possible dissemination of all sorts of operational data... more

New CEO Stresses ICANN’s Role in Cybersecurity

One summer sport in Internet governance is speculating on what direction ICANN's new CEO will take it in. Making the media rounds yesterday on Fox and Lehrer News Hour to talk about the recent DDoS attacks on US and S. Korea government and commercial websites, new CEO Rod Beckstrom pushed how the response to cyber attacks is a coordinated effort, he also alluded to ICANN's role in similar attacks. Responding to a question on the News Hour about the USG policy response to dealing with cyber attacks, Beckstrom highlighted the critical role of ISP filtering, and identified the "organic" as well as "somewhat structured" coordination which occurs during a typical response. More interestingly, he plugged ICANN's facilitating role. more

The Proxy Fight for Iranian Democracy

If you put 65 million people in a locked room, they’re going to find all the exits pretty quickly, and maybe make a few of their own. In the case of Iran’s crippled-but-still-connected Internet, that means finding a continuous supply of proxy servers that allow continued access to unfiltered international web content like Twitter, Gmail, and the BBC... more

No Honor Among Thieves on the Internet

Apple's Wordwide Developers Conference may have just ended, but already, the conference release of Mac's OS X 10.6 — a beta build previewed for developers — has been leaked onto torrent sites. It borders on irony: for years, Mac lovers have touted the superior security of the Mac operating system over Windows, but earlier this year, it was torrent sites — the very sites where OS X 10.6 is now being freely copied — that caused more than 25,000 Mac users to fall victim to the iServices Trojan. Some Macs never learn. more

Why Not an Interim Step Until DNSSEC is Ready?

I'm interested in CircleID community's take on NeuStar's recent announcement of Cache Defender. While only effective for domains the company is authoritative for, that does cover a large number of big Internet brands and financial institutions. Why wouldn't an ISP deploy this now, while waiting for all the myriad issues involved in DNSSEC to be resolved? more

ICANN 35: What’s Going Down, Down Under (Want the Low Down?)

As I've been getting ready to catch my plane for ICANN 35 (Sydney), I can't help but thinking that there are a lot of things going down these days that will dramatically affect makeup of the Internet for years to come. Next year at this time, the root could be a very, very different place. A few of the items that will be getting deconstructed, discussed, debated Down Under are outlined below... more

Fight Phishing With Branding

Phishing, stealing personal information by impersonating a trusted organization, is a big problem that's not going away. Most antiphishing techniques to date have attempted to recognize fake e-mail and fake web sites, but this hasn't been particularly effective. A more promising approach is to brand the real mail and real web sites. more

DKIM for Discussion Lists

There's a pernicious meme floating around that DomainKeys Identified Mail (DKIM) doesn't work with discussion lists, particularly those hosted on common open source software packages like MailMan. It's particularly odd to see this claim after I set it up successfully on a stock Debian server in less than half an hour, just a few weeks ago. Here's how it can, should, and does work. more