Network Security White Papers
Spam, Phishing, and the Looming Challenge of Big Botnets
Overview What could a spammer or phisher do with a botnet of a thousand machines? a hundred thousand? a million? "Send lots of email" is the least worrisome answer to these questions. As anti-spam and anti-phishing defenses improve, there is more than sufficient financial motivation for spammers and phishers to consider what they can accomplish with enormous scale. They begin by looking at a wide range of anti-spam defenses. Many of these, like rate limiting and port 25 blocking, will simply no longer work against big botnets; they explain why. Further, the basic cryptographic assumptions underlying the implementation of SSL certificates and DomainKeys/DKIM need re-examination in light of the massive computing power of big botnets. They describe possible attacks by spammers and phishers, and the implications these attacks have in terms of defense.
| Publisher | University of Copenhagen | File Format | |
|---|---|---|---|
| Date Published | May 2007 | ||
| Format | White Papers | ||
| Topics | |||
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