Apr 15 2008
A next generation CAPTCHA - Asira
Microsoft Research’s Asira (Animal Species Image Recognition for Restricting Access) is a human interactive proof that provides a rather viable alternative to classical CAPTCHAs (Completely Automated Public Turing test to tell Computers and Humans Apart) that use distorted/warped texts on colourful backgrounds.
Asira is inspired by Frozen Bear’s HotCaptcha, Carnegie Mellon’s PIX CAPTCHA, Oli Warner’s KittenAuth. However, the major difference is that Asira uses a 3 million picture database from Petfinder.com while the last two have relatively small collections of images.