This custom control uses the Google's Recaptcha API to bring captchas to your XPages 8.5.2+ instantly.

A captcha is an ui-element that can be integrated on web forms to make sure that a request is sent by a human user sitting in front of a browser. This helps the web-developer and web-administrator to prevent different kinds of automated spam or security attacks or exploits against their website or web application.

This custom control offers you:

• Security against automated spam or security attacks

• Accessibility to blind or visually impaired people through an audio version of the captcha

• With the tabIndex and focusOnLoad properties the captcha integrates into the tab flow of your web-form

• One-time-verification – if the user submits a form and solves the captcha correctly, but the validation of another field fails at the same time, the user won’t have to solve the captcha again (optional)

• Multi-language support (8+)

• Integration on SSL-secured sites (HTTPS)

• OneUI theming available

• Reload button

• Easy to use and maintain. No jar-files or images needed. Copying the custom control into your database is all you need to do

Why I decided to use Recaptcha-API (https://www.google.com/recaptcha/admin/create?app=recaptchacc) instead of a self-made captcha:

• Google does ip address monitoring itself. So suspicious ip addresses are blocked automatically

• Google assures that the captcha stays invulnerable, you don’t have to care about security tests and fixes

• The accessibility features mentioned above

For more information take a look at the documentation document available in the “Documentation” section of this project.

Important: To use the Recaptcha Custom Control you need an individual private/public key-pair for the Recaptcha API that is used behind the scenes. So you need to sign in for an obligatory Google account at https://www.google.com/recaptcha/admin/create?app=recaptchacc) and accept their license agreement http://www.google.com/recaptcha/terms .