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Reduce Spam using Asirra - JavaScript disabled

Microsoft's ASIRRA project - with JavaScript disabled


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.