Add CAPTCHA to the Registration form widget

To improve security, you can add a CAPTCHA to the Registration form widget. You can use the provided Google reCAPTCHA templates or plug in your own CAPTCHA.

Perform the following: 

1. In Sitefinity backend, navigate to Administration » Settings » Advanced.
2. In the treeview, expand WebSecurity » Captcha and click Parameters.
3. Configure the following parameters:
   • Key VerificationUrl and Value https://www.google.com/recaptcha/api/siteverify
     
   • Key SecretKey and Value <The secret from the API key pair that you have created>
   • Key EnableCaptchaValidation and Value true
     This will enable the CAPTCHA validation in the Registration form widget.
4. Save your changes.

Create a custom template for the Registration form widget in the following way:

1. Open your project in Visual Studio.
2. In folder Views/Shared/Components, create a new folder and name it SitefinityRegistration
3. In the context menu of folder SitefinityRegistration, click Add » New Item…
4. Depending on which version of CAPTCHA you want to use, perform one of the following:

Perform the following:

1. Open the page where the Registration form widget is located for editing.
2. In the page editor, hover over the Registration form widget.
3. Click the toggle menu in the widget label.
4. Click  (Edit).
5. In the Registration template dropdown box, select the new template.
6. Save your changes.