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identiPIC is a photo CAPTCHA system whereby a website visitor has to identify a picture to proceed. The system is typically used on web forms to block spambots. A human can identify a picture, a spambot cannot.

The web is awash with spambots that attack contact forms, guestbooks, forums etc. Up until now, the main line of defence against them was the CAPTCHA. A CAPTCHA is a test to tell humans apart from computers (spambots in this case) that relies on the user entering a string of characters presented to them in an image. This worked well for a while until the bots began to overcome them by reading them with OCR (optical character recognition) programs. Another problem with the traditional CAPTCHA is that they are sometimes difficult to read. The advantage of the identiPIC system is that a computer cannot tell what a picture is of but a human can clearly see what it is.