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Re: [Asrg] Spammer proxies using legitamate mail relays

2005-02-16 04:59:27
Jonathan Morton <chromi(_at_)chromatix(_dot_)demon(_dot_)co(_dot_)uk> wrote:
You've heard of hashcash, naturally.

And exactly how long do you expect it will take for spammers to 
install a hashcash computing trojan on their 5 million zombie PCs?  

There are 5 million zombies, perhaps, but there are many *more* 
legitimate e-mail users.

If you want to analyse hashcash's effectiveness, you should read
Richard Clayton and Ben Laurie's paper which uses real numbers
from a medium-sized ISP to show that it cannot be made to work.

http://www.cl.cam.ac.uk/~rnc1/

Tony.
-- 
f.a.n.finch  <dot(_at_)dotat(_dot_)at>  http://dotat.at/
LYME REGIS TO LANDS END INCLUDING THE ISLES OF SCILLY: NORTHEAST 3 OR 4
BECOMING VARIABLE 3 OR LESS, BUT MAINLY NORTH OR NORTHWEST 3 OR 4 LATER
WEATHER: OCCASIONAL RAIN OR DRIZZLE LATER. GOOD BECOMING MODERATE.

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