Asirra AntiSpam

Asirra is a human interactive proof that asks users to identify photos of cats and dogs. It is developed using Captcha module. It provides spam protection to your drupal site using external antispam service Asirra.

Asirra is different because of threir unique partnership with Petfinder.com, the world's largest site devoted to finding homes for homeless pets. They've provided them with over three million images of cats and dogs, manually classified by people at thousands of animal shelters across the United States. In exchange, they provide a small "Adopt Me!" link beneath each photo, supporting Petfinder's primary mission of finding homes for homeless animals.

Asirra consists of two components:

• A JavaScript client component that you add to your web page inside a form. Our code will add an Asirra challenge to your web page. If the challenge is solved correctly, the client code gets an Asirra Ticket from our server, and adds it to your form as a hidden input field.
• A web service at Microsoft Research that your form processor should call each time a user form is submitted, to check that the ticket provided is valid.

Please click here to read How secure is Asirra?

Sorry -- Asirra closed permanently in October of 2014, and it can no longer be installed.

Requirements / Dependencies

• CAPTCHA

Installation

• Place the entire asirra_antispam directory into sites modules directory (eg sites/all/modules).
• Enable this module by navigating to: Administration > Modules
• This module have dependency on captcha module.
• Go to admin/config/people/captcha/asirra and configure its settings.
• Go to admin/config/people/captcha and select "Asirra" as Challenge type for any form.