[hashcash] Re: response to "proof of work proves not to work"?

  • From: Adam Megacz <megacz@xxxxxxxxxxxxxxx>
  • To: hashcash@xxxxxxxxxxxxx
  • Date: Tue, 30 May 2006 10:51:08 -0700

"Eric S. Johansson" <esj@xxxxxxxxxx> writes:
> Adam M, Comcast has screwed up my DNS and free lists is not accepting
> my e-mail.  if you reply to this, please quote my entire message so
> others on the list can understand the context.  Many thanks
> Adam Megacz wrote:
>> I was wondering if the hashcash community has produced any sort of
>> rebuttal to the article "Proof Of Work Proves Not To Work":
>>   http://citeseer.ist.psu.edu/680491.html
> I did a long time ago informally.  One of the authors of the article,
> Ben Laurie, was a founding member of the camram project (and creator
> of the name bless his little heart).  I've pointed out the both of
> them the errors in their analysis and as a result, built the zombie
> calculator to show the real economic cost of proof of work systems.
> the real cost is an opportunity cost.  That proof of work reduces the
> production of spam and the lower volume, reduces revenue.  Reduce it
> enough and you reduce revenue to the point where the spammer can no
> longer stay in business.
> what is particularly frustrating is the lack of response from either
> of them on my analysis and conclusion.

Did you publish your analysis?  Even informally?  If you have a
well-written rebuttal paper that's as detailed as theirs I will
certainly point people to it.

> But no mind, if we can do the appropriate PR, we can overcome one
> negative point.
> I gave a talk at BBN last week on proof-of-work systems which was well
> received.  I show them how proof-of-work systems can be used not only
> for anti-spam but also as a proxy for reputation and attention,
> protecting Web 2.0 applications, and handling the /. effect.
> I even showed a possible method of defending proof-of-work systems in
> a computationally slow environment  when the attacker is using a
> high-speed computer engine.  Think JavaScript versus A.B.'s hashcash
> engine.
> I'm going to do an audio track for the slides and post it one of these
> days.  Hopefully this week.  But I really need to find time to make
> money.  All of this open source stuff is ruining my household budget.
> :-)
> ---eric

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