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[Anti-Spam] reCAPTCHA is a free CAPTCHA service

A CAPTCHA is a program that can tell whether its user is a human or a computer. You’ve probably seen them — colorful images with distorted text at the bottom of Web registration forms. CAPTCHAs are used by many websites to prevent abuse from “bots,” or automated programs usually written to generate spam. No computer program can read distorted text as well as humans can, so bots cannot navigate sites protected by CAPTCHAs.

If you are an owner of a website and looking for an anti-spam/ anti-bot protection for content on your site, you might be interested in implementing a CAPTCHA yourself. However, services like CAPTCHA do add on a lot of server side processing and in my opinion, are better off being offloaded from your servers. One service which offers free CAPTCHA is called reCAPTCHA.

reCAPTCHA helps prevent automated abuse of your site (such as comment spam or bogus registrations) by using a CAPTCHA to ensure that only humans perform certain actions. reCAPTCHA is a free to use service. It also offers an audio test that allows blind people or people to freely navigate your site.

reCaptcha-implement-captcha

When it comes to implementing reCAPTCHA on your website or application, it is as simple as adding a few lines of code on your site.
It offers programming environment plugins for PHP, ASP.NET, Classic ASP, Python, Perl, Ruby, Java, JSP Mailhide Tag and ColdFusion. With regards to Application plugins, you can get plugins for Wordpress, MediaWiki, phpBB, Movable Type, Drupal, Symfony, Typo3, NucleusCMS, vBulletin, Joomla, JSP Mailhide

As reCAPTCHA generates and check the distorted images, you don’t need to run costly image generation programs at your server side and this is one such service which you must use if you are looking out for a Anti-spam / Anti-bot implementation on your website or application.

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This entry was posted on Thursday, October 1st, 2009 at 5:37 pm and is filed under Free, Tools. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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