Uses Javascript and PHP crypt() functionality to ensure that a visitor is not a spambot. Requires no sessions or database. Based on JSSpamBlock
| Author: | Brandon Checketts (profile at wordpress.org) |
| WordPress version required: | 2.0.2 |
| WordPress version tested: | 2.7 |
| Plugin version: | 1.4 |
| Added to WordPress repository: | 11-10-2007 |
| Last updated: | 13-01-2009
Warning! This plugin has not been updated in over 2 years. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.
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| Rating, %: | 0 |
| Rated by: | 0 |
| Plugin URI: | http://www.brandonchecketts.com/bcspamblock/ |
| Total downloads: | 4 430 |
| Active installs: | 600+ |
 Click to start download |
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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