On Thu, 04 Sep 2003, Toad wrote:

> Yay. What is to prevent Mallory from just requesting all the files at
> once?

I'd require a hashcash token.  Something that would require on the order
of 60 minutes work on an average machine. (Skewed based on how much
effort it would take you to insert the file.  Make them pay a good
fraction thereof)  As long as the "sharing"
user keeps a database of spent tokens there should be no problem.

Mallory can't block a legitimate user from getting the file by having
it inserted,  (since it's then inserted) and the "sharing" user requires
Mallory (and legitimate requestors) to spend as much effort as him.

--Dan

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