Notequalsoft CAPTCHA Service.<br/>&copy; Notequalsoft, 2008. <a href="http://www.notequalsoft.com/web/services/captcha/index.html#usage">Terms of Use</a>. Generates a CAPTCHA image of specific size and corresponding public key for validation. Validates a CAPTCHA response for the specified public key. Notequalsoft CAPTCHA Service.<br/>&copy; Notequalsoft, 2008. <a href="http://www.notequalsoft.com/web/services/captcha/index.html#usage">Terms of Use</a>.