"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 -- PGP/GPG: 5C9F F366 C9CF 2145 E770 B1B8 EFB1 462D A146 C380