reCAPTCHA uses an advanced risk analysis engine and adaptive challenges to keep malicious software from engaging in abusive activities on your website. Meanwhile, legitimate users will be able to login, view pages or create posts.
Check out these feature at EasyDiscuss > Settings > Anti Spam > Captcha > GoogleRecaptcha.
Firstly, you'll need to get Site Key and Secret Key from Google reCaptcha. Fill in the necessary information needed and click submit button.
Copy these API key into EasyDiscuss reCaptcha settings.