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A method to ensure authentication responses are from humans based on human perception

IP.com Disclosure Number: IPCOM000178042D
Original Publication Date: 2009-Jan-14
Included in the Prior Art Database: 2009-Jan-14
Document File: 1 page(s) / 40K

Publishing Venue



Current methods of foiling automated scripts designed to target website log-ins are increasingly more complex, but no more successful. Now that the common "captcha" style images with distorted text are being defeated more easily a better solution is required. This paper proposes a method to utilise the peculiarities of human perception through images such as optical illusions. These challenges to the user often result in two answers, an obvious one (Which is actually incorrect, but arrived at almost immediately by a human), and a technically correct one. This system takes advantage of this by not accepting the technically correct answer, but accepting the incorrect human response instead.

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A method to ensure authentication responses are from humans based on human perception

We propose that a new type of challenge be presented to the user which takes advantage of the fallibility of the human brain and its perception of additional information that is not present in the information presented. This would give an extra layer of confidence that a human is providing the responses, as this would be non-trivial to circumvent. In particular, by posing a suitable question that has an obvious answer (that is wrong) and a correct answer, and ensuring that the obvious answer is something that a human would be expected to get almost immediately, we can accept the obvious answer as a pass, and the technically correct answer as a fail.

    A prime example for such a question would be to base it on human vision, and the peculiarities of optical illusions.
1. A user wishes to access information or place an order online which the host/seller wants to protect against automated scripts.
2. A challenge is presented detailing a question and some information to be taken in. Typically this will be graphical in nature to take advantage of our visual senses that are a rich area for suitable questions.
3. The question is worded in such a way that it has two answers. a) the correct answer b) an answer that can be quickly arrived at by making seemingly obvious assumptions or by looking at information presented (without thinking about it too much...