CAPTCHA Validation in liferay

A CAPTCHA is a program that protects websites against bots by generating and grading tests that humans can pass but current computer programs cannot.

Enabling captcha in liferay : 
Basically we can enable captcha validation for following actions

    captcha.check.portal.create_account=true
    captcha.check.portal.send_password=true
    captcha.check.portlet.message_boards.edit_category=false
    captcha.check.portlet.message_boards.edit_message=false

Just add the property which we need in portal-ext.properties

And restart your server.

Now click on create account in your sign in portlet.

You will see simple captcha text verification for creating account.

ReCaptcha : 

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

Steps to integrate Recaptcha

Step 1:

Login to 

http://www.google.com/recaptcha and give all necessary information.

Step 2: 

And you will get site key and secret key

Step 3:

Now log in to portal as admin user.And goto control panel/Server Administration.

Step 4:

Enable recaptcha key and give site key as recaptcha public key and give secret key as recaptcha private key and save.

Step 5:

Goto create account.You will see recaptcha now.