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IWETHEY Home / IWETHEY Board / Open Forum / Spam filter poisoning
Post #137,391
by tjsinclair
1/23/04 7:25:40 PM
Reply
New Spam filter poisoning

These are intended to mess up the Bayesian filtering software that most spam-blockers use to identify whether an e-mail is junk or not.

I'm noticing more of this myself.

All part of the escalating war between spammers and humans.

Tom Sinclair

The question seldom addressed is *where* Medusa had snakes. Underarm hair
is an even more embarassing problem when it keeps biting the top of the
deodorant bottle.
-- (Terry Pratchett, Soul Music)
Post #137,419
by admin
Picture of admin
1/23/04 10:12:02 PM
Reply
New It's working, too.
Many of the periodic spams my filter used to get are now making it through.
Regards,

-scott anderson

"Welcome to Rivendell, Mr. Anderson..."
Post #137,435
by tjsinclair
1/23/04 11:09:29 PM
Reply
New I'm noticing

Mail.app uses a Bayesian junk mail filter and I've been noticing more false positives and false negatives lately.

This has been a topic of discussion in my Machine Learning class, where we, coincidentally, are coding up Naive Bayesian algorithms.

Fascinating stuff, all in all.
Tom Sinclair

The question seldom addressed is *where* Medusa had snakes. Underarm hair
is an even more embarassing problem when it keeps biting the top of the
deodorant bottle.
-- (Terry Pratchett, Soul Music)
Post #137,459
by Ashton
1/24/04 3:07:08 AM
Reply
New obv stat-babe question -
Test for {particularly obtuse} thus new filter category - and yes, I see that this might require the overhead of a quick-dictionary test 1, 2, 3, .. n ==> yup, It's Random Shit: don't accumulate.

Then too, if it's PGP - - :(
     Spam emails loaded with random words ? - (dmarker) - (5) - Jan. 23, 2004, 07:22:04 PM EST
         ObResidentBrit Bayesian filter poison -NT - (deSitter) - Jan. 23, 2004, 07:23:16 PM EST
         Spam filter poisoning - (tjsinclair) - (3) - Jan. 23, 2004, 07:25:40 PM EST
             It's working, too. - (admin) - (2) - Jan. 23, 2004, 10:12:02 PM EST
                 I'm noticing - (tjsinclair) - Jan. 23, 2004, 11:09:29 PM EST
                 obv stat-babe question - - (Ashton) - Jan. 24, 2004, 03:07:08 AM EST

Every problem that humanity has ever encountered throughout history can be traced back to Gary in accounting.
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