Spamming could be one of the most common and irritating problems faced by the blog publishers. Especially if you are depending on popular platforms like WordPress then yon can’t avoid such a nightmare. Due to high number of spamming most of the WordPress users are recommended to use captcha in login or registration form. One of the popular plugin have been using by many blogger is Better WordPress reCAPTCHA. By using this plugin you can easily add CAPTCHA in WordPress registration or login form. This plugin utilizes Google reCAPTCHA to help your blog stay out of reach from spammers. Most amazing part is you can use this plugin with Akismet and Contact Form 7.
First of all get the plugin from above link and activate it. Upon activation go to Plugin settings menu:
You need API key to activate the plugin. The link appeared in plugin page to create API keys is actually changed and here is the new URL: https://www.google.com/recaptcha/admin#list . Go to this link and generate API key:
Here are the keys. Enter Site Key in Public Key box and Secret Key in Private Key box to activate Better WordPress reCAPTCHA plugin.
Then set other settings and select theme options and you are done. Here are some snap of Google reCAPTCHA: