A TEAM of computer boffins have emerged from their smoke filled labs with an "effectively perfect" method for blocking the most common kind of spam.
The system, developed by a team at the International Computer Science Institute in Berkeley, California, and the University of California, San Diego, looks at a trick that spammers use to defeat email filters.
According to New Scientist, as a spam email is made by a botnet it is changed to confound spam filters. However each message is generated from a template that specifies the message content. The team worked out that analysing such messages could reveal the template that created them and then it would provide a watertight method of blocking spam from that bot.
Testing the idea, the team installed a previously captured software bot onto a machine. After analysing 1,000 emails generated by this compromised machine the researchers were able to reverse-engineer the template.
Once they had identified the template then it was possible to enable filters to block further spam from that bot with 100 per cent accuracy.
The research will be presented in March at the Network and Distributed System Security Symposium in San Diego. µ
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