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What's Recaptcha? #

Recaptcha is a Google service that generates captchas. It alternatively has sound-based captchas for the hard of sight.

Why recaptcha? #

It tends to be faster (doesn't use your servers to generate the captcha) and has the sound feature that SimpleCaptcha (the default captcha system in Liferay) doesn't have.

Enable Recaptcha in Liferay #

To enable it, add this to your (if you're in the tomcat bundle that's tomcat-{version}/webapps/ROOT/WEB-INF/classes/ If the file doesn't exist, you should create it (and read about how to configure a real database, because using HSQL for a real site is not a good idea).

Copy and paste the following, but then go to to get your public and private keys.

# Enable or not reCaptcha



# Urls to access reCaptcha services

#reCaptcha domain specific keys
captcha.engine.recaptcha.key.private=YOUR KEY. FROM
captcha.engine.recaptcha.key.public=YOUR KEY. FROM

NOTE: Make sure when you copy these three lines below, that you copy without the brackets:

captcha.engine.recaptcha.url.noscript= captcha.engine.recaptcha.url.verify= }}}

Starting in Liferay 6.1, Recaptcha can be enabled in the control panel under "Server Administration." See Easily Improve your Captcha for more information.

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Cool thanks a lot Samuel Corné Aussems 27 luglio 2010 22.53
If you need to use ReCaptcha on an... James Denmark 22 marzo 2011 12.05 James Denmark 22 marzo 2011 12.07

Cool thanks a lot Samuel
Inviato il 27/07/10 22.53.
If you need to use ReCaptcha on an ssl-encrypted site the links above will throw security violations in the browser. For secure access to recaptcha the properties above can be changed to but they are changing on 11-Apr-2011 from to

<a href="­035a">Link to discussion on ReCaptcha Google Group</a>
Inviato il 22/03/11 12.05.
Inviato il 22/03/11 12.07 in risposta a James Denmark.