=== headwinds ===
Contributors: lenhattien
Donate link: kapow.cs.pdx.edu
Tags: Proof of Work, anti-spam
Requires at least: 3.0
Tested up to: 3.5
Stable tag: 2.2
License: GPLv2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html

== Description ==

HeadWinds uses the proof-of-work (or “client puzzle”) approach for combating spam. Proof-of- work approaches slow down spammers by requiring them to solve computational puzzles before accessing a desired service. The idea is to impose a per-access cost in hopes of reducing abuse. More specifically, the cost to spammers will be computational resources that they devote to solving a puzzle before sending each message. The approach was first outlined by Dwork and Naor. However, Laurie and Clayton demonstrated that a small constant cost would fail to significantly reduce spam and a large one would burden legitimate users. Later, Liu and Camp demonstrated that if puzzle difficulties were based on user reputations then a proof-of-work approach would indeed be successful. Thus, malicious clients (spammers) would need to be issued “harder” (longer to solve) puzzles than non- malicious clients.

== Installation ==

1. Upload folder `headwinds` to the `/wp-content/plugins/` directory
2. Activate the plugin through the 'Plugins' menu in WordPress
3. Headwinds will store the temporary data to /tmp on the server where you host your Wordpress site.

== Upgrade Notice ==

= 2.2 =
* Please upgrade to the new version
= 2.1 =
* The old plugin may not work with the new model

== Changelog ==

= 2.2 =
* Add headwinds server status

= 2.1 =
* Fix readme.txt
* Simplify the cookies model
* Storing local score and timestamp

= 2.0 =
* Update code so it can work with headwinds2cookies protocol located on rabbit.cs.pdx.edu
* Reload page after verifying cookies complete