Vast Active Library and Information Science blog. From a recent library science graduate in Wellington, New Zealand. A focus on reference and current awareness tools and issues, especially free, web-based resources.

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Tuesday, February 10, 2004
How to make spam unstoppable  
The BBC reports on an anti-spam researcher who has discovered a fool-proof way to fool Bayesian filters.

To find out how to beat the filters Mr Graham-Cumming sent himself the same message 10,000 times but to each one added a fixed number of random words.

When a message got through he trained an "evil" filter that helped to tune the perfect collection of additional words.

Soon he had generated a short list of words that, if added to a spam message, would guarantee its safe passage into his inbox.

Why am I left thinking that it was a bad idea to publicise this?

Original here


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