Leveraging the CAPTCHA problem

Authors:
Daniel Lopresti
Affiliations:
Department of Computer Science and Engineering, Lehigh University, Bethlehem, PA
Venue:
HIP'05 Proceedings of the Second international conference on Human Interactive Proofs
Year:
2005

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Abstract

Efforts to defend against automated attacks on e-commerce services have led to a new security protocol known as a CAPTCHA, a challenge designed to exploit gaps in the perceptual abilities between humans and machines. In this paper, we propose a new paradigm for building CAPTCHA’s which offers simultaneous benefits to both online security and pattern recognition research. We illustrate our discussion with a number of examples and suggest various directions for future work.