In designing web applications, CAPTCHA tests are sometimes necessary to help prevent Bad People from automating attacks on your site. reCAPTCHA, a free service offered by Google, is a popular CAPTCHA service. While reCAPTCHA provides “plugins” for many client technologies, Google Web Toolkit (GWT) isn’t one of them. Fortunately, it’s quite straightforward to integrate using the reCAPTCHA AJAX API.
