E-Book Overview
This book constitutes the refereed proceedings of the Second International Workshop on Human Interactive Proofs, HIP 2005, held in Bethlehem, PA, USA in May 2005.
The 9 revised full papers presented were carefully reviewed and selected for presentation. This book is the first archival publication devoted to the new class of security protocols called human interactive proofs. The variant of HIPs being used in e-commerce and Web services today is completely automatic public Turing tests to tell computers and humans apart, CAPTCHAs. The papers in this book are organized in topical sections on CAPTCHAs and performance analysis, HIP architectures, HIP as security systems components.
E-Book Content
Lecture Notes in Computer Science Commenced Publication in 1973 Founding and Former Series Editors: Gerhard Goos, Juris Hartmanis, and Jan van Leeuwen
Editorial Board David Hutchison Lancaster University, UK Takeo Kanade Carnegie Mellon University, Pittsburgh, PA, USA Josef Kittler University of Surrey, Guildford, UK Jon M. Kleinberg Cornell University, Ithaca, NY, USA Friedemann Mattern ETH Zurich, Switzerland John C. Mitchell Stanford University, CA, USA Moni Naor Weizmann Institute of Science, Rehovot, Israel Oscar Nierstrasz University of Bern, Switzerland C. Pandu Rangan Indian Institute of Technology, Madras, India Bernhard Steffen University of Dortmund, Germany Madhu Sudan Massachusetts Institute of Technology, MA, USA Demetri Terzopoulos New York University, NY, USA Doug Tygar University of California, Berkeley, CA, USA Moshe Y. Vardi Rice University, Houston, TX, USA Gerhard Weikum Max-Planck Institute of Computer Science, Saarbruecken, Germany
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Henry S. Baird Daniel P. Lopresti (Eds.)
Human Interactive Proofs Second International Workshop, HIP 2005 Bethlehem, PA, USA, May 19-20, 2005 Proceedings
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Volume Editors Henry S. Baird Daniel P. Lopresti Lehigh University Computer Science and Engineering Department Bethlehem, Pennsylvania, USA E-mail: {baird,lopresti}@cse.lehigh.edu
Library of Congress Control Number: 2005926089 CR Subject Classification (1998): I.4, I.5, H.4, C.2, D.4.6, K.4.4, K.6.5, H.3 ISSN ISBN-10 ISBN-13
0302-9743 3-540-26001-3 Springer Berlin Heidelberg New York 978-3-540-26001-1 Springer Berlin Heidelberg New York
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Preface
E-commerce services are suffering abuse by programs (bots, spiders, etc.) masquerading as legitimate human users. Efforts to defend against such attacks have, over the past several years, stimulated investigations into a new family of security protocols – “Human Interactive Proofs” (HIPs) – which allow a person to authenticate herself as a member of a given group: e.g., as a human (vs. a machine), as herself (vs. anyone else), as an adult (vs. a child). Most commercial uses of HIPs today are CAPTCHAs, “Completely Automatic Public Turing tests to tell Computers and Humans Apart,” which exploit the gap in ability between humans and machine vision sys