Threat Intelligence

Are Phishing and Malware Separate Threats?

Phishing is when bad guys try to impersonate a trusted organization, so they can steal your credentials. Typically they'll send you a fake e-mail that appears to be from a bank, with a link to a fake website that also looks like the bank. Malware offers another more insidious way to steal your credentials, by running unwanted code on your computer... I like VeriSign's characterization of this kind of malware as an insecure endpoint, the PC which is the endpoint of the conversation with the bank isn't actually under the control of the person who's using it.

Routing Redundancy: How Much Is Enough?

Internet connectivity is a good thing. Many of us depend on it for everything from our livelihoods to our entertainment. However, the Internet is very fragile and even the The New York Times is worried about it. But they're primarily concerned with overloads that can occur when everyone on the planet does the same thing at roughly the same time, such as surfing for news about Michael Jackson. Unfortunately, we will never avoid all such scenarios. Physical systems are designed around average and typical peak loads, not around extremely high loads associated with very unlikely events. Who would pay for that?

Twitter, DDoS and the Motivations Behind the Attack

As we all know by now, last week, on Thursday, August 7, Twitter was hit with a denial-of-service attack that took it down for several hours. Other social networking sites like Facebook, LiveJournal, Youtube and Blogger were also hit. They managed to repel the attack although Facebook was not quite as successful as the other larger players. The theory floating about at the moment is that this was a politically oriented play designed to target one guy: a blogger. We are nearing the 1-year anniversary of a the Russian/Georgian 2008 war. There is a pro-Georgian blogger by the username of "Cyxymu" who had accounts on all of these services.

Why Can’t We Make the Internet Secure?

In a discussion about a recent denial of service attack against Twitter, someone asked, "Some class of suppliers must be making money off of the weaknesses. Anybody out there have a prescription for the cure?" Sure, but you're not going to like it. The Internet was originally a walled garden, where its operators knew who all the users were and could eject anyone who misbehaved...

Cutting Through the Twitter DDoS Hype

There are a lot of theories flying around about why Twitter and other social media services got knocked offline yesterday. I've heard rumors about it being linked to political tension between Georgia and Russia. Others blame Iran for the outages. I'm not a political commentator, therefore I cannot comment on anyone's political views -- but I have some logic and common sense, and I can draw some objective conclusions.

More on Networks and Nationalization With Respect to Cyberwar

As a follow up to Susan Brenner's Networks and Nationalization and my comment there, I will go further in this post and talk about the "cyberwar" and "offense" aspects of her article. I think I made this point elsewhere as well... but before getting into a war, it'd be a brilliant idea to actually know that you can win. Cyberwarfare is the sort of game where you don't really need to be a huge government with the largest standing army in the world and sophisticated weaponry in order to win...

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...

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.

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...

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...