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Plugin Description
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
Screenshots
No screenshots provided
