Emacs Lisp interface to reCAPTCHA.
This file contains an elisp interface to Google's reCAPTCHA service; two different areas are covered:
reCAPTCHA: verifies that the user as correctly introduced the CAPTCHA
reCAPTCHA mailhide: used to encrypt email addresses in webpages, and decrypt them after a successful CAPTCHA
The main entry points are:
- recaptcha-html: outputs the HTML code that needs to be included in a webpage to display the CAPTCHA
- recaptcha-verify: takes as input the challenge (i.e. what the user wrote) and validates the CAPTCHA
- recaptcha-mailhide-html: outputs the HTML to show an email address.
NB: it uses the github version of Markus Sauermann's aes.ek available here: https://github.com/gaddhi/aes .