On Mon, 8 Dec 2003 10:23:25 -0500, Pedro Sam <[EMAIL PROTECTED]> writes:

> > Personally, I think the fundamental problem is HTML. HTML is too
> > powerful of a display language to be filtered, and thats before
> > JavaScript is added into the mix. Just look at the URL above. Almost
> > all of those tricks are directly enabled by HTML.
> > 
> > IMHO, I'd be perfectly happy with a spam filter that bitbucked HTML,
> > and caught all plaintext spam. If someone wants HTML, then they can
> > deal with the collaged spam.
> 
> I keep on thinking, would it not be more convenient to call "lynx -dump" (or 
> equivalent), before using SA to process it?

That doesn't solve the problem of javascript, which is pretty much the
neutron bomb for a collage attack. The choices would be either to
implement a javascript interpreter into a spamchecker, or to
whack-a-mole each decoder as it is invented and used. (Until someone
writes a program to generate javascript decoders.)

I'm not too familar with CSS, but AFAIK, it too could be used in
collage attacks. 

Also, lynx cannot handle tables and frames.

Given this, I think there's no way to win with HTML email. There's
just too many ways to engage in these sorts of attacks. Perhaps just
forcing all spam to be HTML will be enough --- then everyone can
bitbucket HTML email and in ten years we come full circle.

Scott


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