bcSpamBlock

Screenshots

bcSpamBlock is a simple way to protect your blog from comment spam. It ensures that the client is a human by using a small bit of javascript on the comments page. Users with Javascript enabled will never notice any difference. For users without Javascript, they will have to copy/paste a short code into a textbox to confirm. This plugin was designed to be as light and compatible as possible. It doesn’t require PHP sessions, a database table or file-based lookups. It uses a bit of cryptography to have the visitor submit all of the information necessary to validate them. For trackbacks and pingbacks, it ensures that the IP requesting the pingback resolves back to the website it is saying that it is. If so, it retrieves the page that it says contains the link, and makes sure that it does, in-fact have a like to this blog. How it works: Essentially, this generates one random value, and a crypted version of it with salt. The crypted version is put directly into a hidden field. If the visitor has JavaScript enabled, the original random value one is copied to a second field via javascript and then hidden If the visitor has javascript disabled, the user must copy/paste the random value into the input box Original logic for the Javascript portion was taken from the JS SpamBlock WordPress plugin by Paul Butler (http://www.paulbutler.org/) The idea for the trackback validation came from the simple-trackback-validation plugin License Copyright (c) 2007 – 2009 Brandon Checketts This software is provided ‘as-is’, without any express or implied warranty. In no event will the authors be held liable for any damages arising from the use of this software. Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions: The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. This notice may not be removed or altered from any source distribution.