On Jun 14, 2011, at 10:35 AM, Aaron Toponce <aaron.toponce@xxxxxxxxx> wrote: > On Tue, Jun 14, 2011 at 01:03:13PM -0400, Eric S. Johansson wrote: >> did you know about this? >> >> http://wordpress-plugins.feifei.us/hashcash/ > > Indeed, although technically speaking, it isn't Hashcash. It doesn't use > the tokens, nor does it the Hashcash algorithm. Instead, it uses > obfuscation in JavaScript to force the client to present a matching key. > It is proof-of-work, but it's not Hashcash. A single hash is not proof-of-work. David