Skip Navigation | Groups

This site uses cookies- for more information see the Cookie Policy | Continue



2008080401 Email to Ronx

Reduce Spam using the Asirra Project

Microsoft's ASIRRA project

The Assira project is no longer available.However, the latest version of Google's Recaptcha uses the Assira methodology (expanded to select everyday objects or infrastructure - such as buses, crosswalks, traffic lights - to determine if the form-filler is human or machine.

Asirra (Animal Species Image Recognition for Restricting Access) is a HIP(Human Interface Proof) that works by asking users to identify photographs of cats and dogs.

If the animals are selected incorrectly, the message is not sent.