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. -- . o . o . o . . o o . . . o . . . o . o o o . o . o o . . o o o o . o . . o o o o . o o o