Spam

MicroID: A Microformat for Claiming Ownership

This morning I learned about MicroIDs from Doc Searls. Jeremy Miller has proposed MicroIDs as a microformat that "allows anyone to simply claim verifiable ownership over their own pages and content hosted anywhere." A MicroID is a hash of two hashed values. The first is a verified communication ID. The second is the URI of the site that the content will be published on. You end up with a unique, long string of gibberish that can be put in the header of a Web page or even wrapped around one part of a page... more

A Fundamental Look at DNSSEC, Deployment, and DNS Security Extensions

In looking at the general topic of trust and the Internet, one of the more critical parts of the Internet's infrastructure that appears to be a central anchor point of trust is that of the Domain Name Service, or DNS. The mapping of "named" service points to the protocol-level address is a function that every Internet user relies upon, one way or another. The ability to corrupt the operation of the DNS is one of the more effective ways of corrupting the integrity of Internet-based applications and services. If an attacker can in some fashion alter the DNS response then a large set of attack vectors are exposed. ...The more useful question is whether it is possible to strengthen the DNS. The DNS is a query -- response application, and the critical question in terms of strengthening its function is whether it is possible to authenticate the answers provided by the DNS. DNSSEC provides an answer to this question. more

Net Neutrality Is As Silly As So-Called Internet Governance

From the perspective of Internet security operations, here is what Net Neutrality means to me. I am not saying these issues aren't important, I am saying they are basically arguing over the colour of bits and self-marginalizing themselves. For a while now I tried not to comment on the Net Neutrality non-issue, much like I didn't comment much on the whole "owning the Internet by owning the Domain Name System" thingie. Here it goes anyway. Two years ago I strongly advocated that consumer ISP's should block some ports, either as incident response measures or as permanent security measures... more

Making DKIM More Useful with Domain Assurance Email

The IETF DKIM working group has been making considerable progress, and now has a close-to-final draft. DKIM will let domains sign their mail so if you get a message from [email protected], the furble.net mail system can sign it so you can be sure it really truly is from furble.net. But unless you already happen to be familiar with furble.net, this doesn't give you any help deciding whether you want the message. This is where the new Domain Assurance Council (DAC) comes in... more

Another Try at Proof-of-Work e-Postage Email

Another paper from the Fifth Workshop on the Economics of Information Security, (WEIS 2006) is Proof of Work can Work by Debin Liu and L, Jean Camp of Indiana University. Proof of work (p-o-w) systems are a variation on e-postage that uses computation rather than money. A mail sender solves a lengthy computational problem and presents the result with the message. The problem takes long enough that the sender can only do a modest number per time period, and so cannot send a lot of messages, thereby preventing spamming. But on a net full of zombies, proof of work doesn't work. more

Phishing Moving to the Web Channel

Today we received one of the first phish attempts to be made as a web spam (comment spam/blog spam) attempt. I wasn't convinced, and thought that perhaps it was a way to gather and verify RELEVANT online identities. Someone put me straight. It's phishing. I've often in the past had run-ins with the good folks in the anti virus realm back between 1996 and 2005 who thought Trojan horses and then spyware were not part of their business. Years later the AV business people ruled it is part of their business and ran to catch up. Same with botnets. more

How to Stop Spam

I got a letter the other day from AOL postmaster Carl Hutzler, about how the Internet community could get rid of spam, if it really wanted to. With his permission, here are some excerpts. "Spam is a completely solvable problem. And it does not take finding every Richter, Jaynes, Bridger, etc to do it (although it certainly is part of the solution). In fact it does not take email identity technologies either (although these are certainly needed and part of the solution)." more

Search Engines and Registrars Getting Creative with Whois Database?

One of the best sources of information about sites on the web is the Whois database. A trio of patent applications from Go Daddy, published last week at the US Patent and Trademark Office, explores whether adding additional information to the Whois database might help reduce spam, phishing, and other fraudulent practices and improve search engine results. The patent filings from Go Daddy would add reputation information to the published Whois data to let others use it for a number of reasons, including enabling search engines incorporate it into their ranking mechanisms. ...The patent application from Google focuses upon fighting web spam using a wide range of data, including that associated with domain names. ...We can't really be certain that Google is presently using this information, but there are some indications that they may be... more

Questioning Parked Domains and Google AdNonSense

Is contextual advertising helping or hurting the web? It basically started with Google Adsense even though the concept wasn't new. It had never been done on the scale that Google did it. Now we have Yahoo Publisher. MSN is building their version. We have Konterra and a whole lot of other companies scrambling to cash in on the contextual ad craze. Initially contextual advertising seems like a good idea. Ads based on the content of your website that might benefit your readers or visitors. Ads that are related to the content you produce that will also help you make a little money for your efforts. However greed ruins all good things. Now there are probably millions of webpages online that are built for the sole purpose of cashing in on contextual advertising. ...To make money with contextual advertising you want your content to be bad. Yes, you want it to be bad. more

Black Frog: Next Generation Botnet, No Generation Spam Fighting

Black Frog -- a new effort to continue the SO-CALLED Blue Security fight against spammers. A botnet, a crime, a stupid idea that I wish would have worked -- News items on Black Frog. Blue Frog by Blue Security was a good effort. Why? Because they wanted to "get spammers back". They withstood tremendous DDoS attacks and abuse reports, getting kicked from ISP after ISP. ...The road to hell is filled with good intentions. Theirs was golden, but they got to hell, quite literally, non-the-less. ...When Blue Security went down, some of us made a bet as to when two bored guys sitting and planning their millions in some café would show up, with Blue Security's business plan minus the DDoS factor. Well -- they just did. more

Cricket Liu Interviewed: DNS and BIND, 5th Edition

In follow-up to recent announcement on the release of the latest edition of the very popular DNS and BIND book -- often referred to as the bible of DNS -- CircleID has caught up with Cricket Liu, co-author and a world renowned authority on the Domain Name System. In this interview, Cricket Liu talks about emerging issues around DNS such as security and IPv6 support, and important new features such as internationalized domain names, ENUM (electronic numbering), and SPF (the Sender Policy Framework). "Cricket Liu: We're now seeing more frequent attacks against DNS infrastructure. ...Turns out that name servers are terrific amplifiers -- you can get an amplification factor of nearly 100x. These attacks have raised awareness of the vulnerability of Internet name servers, which is possibly the only positive result..." more

Wall Street Journal Article on Whois Privacy

Today's Wall Street Journal discusses the fight over Whois privacy. The article on the front page of the Marketplace section starts by discussing how the American Red Cross and eBay use the Whois database to track down scammers: "Last fall, in the wake of Hurricane Katrina, the American Red Cross used an Internet database called "Whois" that lists names and numbers of Web-site owners to shut down dozens of unauthorized Web sites that were soliciting money under the Red Cross logo. Online marketplace eBay Inc. says its investigators use Whois hundreds of times a day..." more

Fight Spam With the DNS, Not the CIA

It seems like spam is in the news every day lately, and frankly, some of the proposed solutions seem either completely hare-brained or worse than the problem itself. I'd like to reiterate a relatively modest proposal I first made over a year ago: Require legitimate DNS MX records for all outbound email servers.

MX records are one component of a domain's Domain Name System (DNS) information. They identify IP addresses that accept inbound email for a particular domain name. To get mail to, say, linux.com, a mail server picks an MX record from linux.com's DNS information and attempts to deliver the mail to that IP address. If the delivery fails because a server is out of action, the delivering server may work through the domain's MX records until it finds a server that can accept the mail. Without at least one MX record, mail cannot be delivered to a domain.
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California Frets about Goodmail Email

On Monday the 3rd, California state Senator Dean Flores held a hearing of the E-Commerce, Wireless Technology, and Consumer Driven Programming committee grandly titled AOL: You Have Certified Mail, Will Paid E-mail Lead to Separate, Unequal Systems or is it the Foolproof Answer to Spam?. The senator's office said they were very eager to have me there, to the extent they offered to fly me out from New York, so since I happened to be on the way home from ICANN in New Zealand that weekend, I took a detour through Sacramento. Sen. Florez conducted the hearing, with Sens. Escutia and Torlakson sitting in briefly. Unfortunately, Sen. Bowen, who is very well informed on these topics, wasn't there. There were five panels of speakers, and I got to lead off... more

Hypertext Mail Protocol (a.k.a. Stub Email): A Proposal

Back in the days of dial-up modems and transfer speeds measured in hundreds of bits per second, unwanted email messages were actually felt as a significant dent in our personal pocketbooks. As increases in transfer speeds outpaced increases in spam traffic, the hundreds of unwanted emails we received per week became more of a nuisance than a serious financial threat. Today sophisticated spam filters offered by all major email providers keep us from seeing hundreds of unwanted emails on a daily basis, and relatively infrequently allow unwanted messages to reach our coveted Inboxes. So, to some degree, the spam problem has been mitigated. But this "mitigation" requires multiple layers of protection and enormous amounts of continually-applied effort. more