Edgar Friendly wrote:
> Maybe a good list of people to choose from could simply be the people
> that user trusts to be good posters.

Good point - that would make the UI simpler as well. When a user first
replies to a poster, the poster's puzzle will be presented. Subsequent
replies to the same poster won't require a puzzle. (That will also
discourage people from replying to disposable bot identities.)

> I guess Frost could detect the duplicate posts and filter
> the second one, unless the spammers mutated the original post
> slightly...  ick, that's a path better not traveled.

It might be better to detect duplicate puzzles, since the attack relies
on unmodified puzzles... or at least puzzles with the same *answer*, I
guess the attacker might be able to add noise to the *question*... argh.

> The potential for fragmentation must be
> kept low, with real people that consistently post having trust from
> nearly the whole community, and spammers having no trust from this
> community.

I agree, fragmentation is a very important issue. Hopefully there will
be enough newbies (who have to disable filtering and trawl through the
spam until they've established themselves in the web of trust) to knit
the community back together if it fragments. "If there is hope, it lies
in the n00bs."

Cheers,
Michael
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