On Monday 29 December 2003 01:07 am, Ivar Snaaijer wrote:
> Make the spammer pay <http://news.bbc.co.uk/2/hi/technology/3324883.stm>:

> In the article it is mentioned that it seems a Microsoft idea, but I
> doubt that directly. Not that there are no good ideas coming from
> Redmond, just never new ones.
>  The link again (to copy yourself) :
> http://news.bbc.co.uk/2/hi/technology/3324883.stm

> What would be the implications (probably will take time to check
> validity in SA) so the receiving end is paying too, only to check if it
> is valid, how would it work, prior art, comments ?

SpamAssassin already has something like this, called HashCash 
(http://www.hashcash.org/).  While the receiving end pays to do a check, the 
sending end has to spend a *lot* more time on the computations, slowing 
things down on the sending end.  Microsoft has put a twist on it by creating 
an algorithm who's quickness depends upon the speed of the computer's memory 
(RAM), rather than the speed of the CPU.  This means that old computers will 
be able to do the check about a quickly as new computers (since memory access 
speeds haven't changed that much), so people won't have to upgrade their 
computer hardware just to be able to perform the checks on their email.

-- 
Give a man a match, and he'll be warm for a minute, but set him on
fire, and he'll be warm for the rest of his life.

Advanced SPAM filtering software: http://spamassassin.org



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