What is a Captcha
A CAPTCHA is a type of challenge-response test used in computing to ensure that the response is not generated by a computer. The process usually involves one computer (a server) asking a user to complete a simple test which the computer is able to generate and grade. Because other computers are unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human.
Captcha – The Solution to Today’s Spam
In a cyber world of increasing spam by every day, Captcha seems to be the only effective, yet easy to implement solution for website owners and publishers. They have been blocking the bots and mass spammers for several years now, but spammers are getting smarter by each passing day and now software and applications exist, that can break old types of captcha fairly easily.
I have also come across a few professionally run services on some black0hat forums, which provide these services on charge basis…and the charges are astonishingly low, sometimes $2 for 1000 captcha solved.
And so the race of developing better and more secure Captcha service begin. The latest offering on this service is Video Captcha, where visitors are shown a small video clip having lots of characters. One of the string of characters is in a different colour, say red. The visitors has to pick that string of characters and input that into the box provided. This service is presently been provided by NuCapcha. And the best part is that it is free of cost at present.
Here is a sample video of the NuCaptcha Text.
NuCaptcha WordPress Plugin
Since WordPress has gained huge popularity as a blogging and CMS platform, more and more spammers are getting attracted to WordPress Blogs and spam them. Traditional captchas often fail and professional captcha solver services can easily break these traditional captcha.
NuCaptcha also offers a WordPress plugin for its video captcha. You just have to download the plugin and install it like any other wordpress plugin.
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