Financial Cryptography and Data Security: 24th International Conference, FC 2020 , Kota Kinabalu, Malaysia, February 10–14, 2020 Revised Selected Papers

689 Pages·2020·25.6 MB·English

by  Joseph Bonneau, Nadia Heninger

Joseph Bonneau
Nadia Heninger (Eds.)
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Financial Cryptography
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24th International Conference, FC 2020
Kota Kinabalu, Malaysia, February 10–14, 2020
Revised Selected Papers
Lecture Notes in Computer Science 12059
Founding Editors
Gerhard Goos
Karlsruhe Institute of Technology, Karlsruhe, Germany
Juris Hartmanis
Cornell University, Ithaca, NY, USA
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Elisa Bertino
Purdue University, West Lafayette, IN, USA
Wen Gao
Peking University, Beijing, China
Bernhard Steffen
TU Dortmund University, Dortmund, Germany
Gerhard Woeginger
RWTH Aachen, Aachen, Germany
Moti Yung
Columbia University, New York, NY, USA
More information about this series at http://www.springer.com/series/7410
Joseph Bonneau Nadia Heninger (Eds.)
(cid:129)
Financial Cryptography
and Data Security
24th International Conference, FC 2020
–
Kota Kinabalu, Malaysia, February 10 14, 2020
Revised Selected Papers
123
Editors
JosephBonneau Nadia Heninger
NewYork University University of California
NewYork City,NY, USA LaJolla, CA,USA
ISSN 0302-9743 ISSN 1611-3349 (electronic)
Lecture Notesin Computer Science
ISBN 978-3-030-51279-8 ISBN978-3-030-51280-4 (eBook)
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Preface
The 24th International Conference on Financial Cryptography and Data Security
(FC 2020), was held February 10–14, 2020, at the Shangri-La Tanjung Aru Resort in
Kota Kinabalu, Sabah, Malaysia.
We received 162 paper submissions. Of these, 34 full papers and 2 short papers
were accepted, a 22.2% acceptance rate. Revised papers appear in these proceedings.
Wearegratefulforthecontributionsofthe76membersoftheProgramCommittee.
The review process took place over approximately seven weeks in October and
November2019.Anextensiveonlinediscussionphasewasutilizedtoguidedecisions.
The review process was double-blind and carried out entirely online via the HotCRP
review platform. All accepted submissions received at least three reviews. A total of
554 reviews were completed, an average of 3.6 per submitted paper. The Program
Committee members provided thoughtful and constructive feedback on all papers,
which considerably strengthened the quality of the final program. We are especially
thankful to Program Committee members who served as shepherds for 11 of the 36
accepted papers which were accepted conditionally on specific improvements being
completed. We also appreciate the reviews contributed by 27 external reviewers.
The community’s interest in blockchain-based cryptocurrencies continued to grow
andforthefirstyearrepresentedthemajorityoftheprogram.Aswasdoneforthe2019
program, papers were submitted into one of two self-selected “tracks”: traditional
financial cryptography and blockchains. The Program Committee was composed of
approximately equal proportions of reviewers for the two tracks. The final program
contained31paperssubmittedasblockchainpapersandonly5submittedprimarilyas
papers on traditional topics. Analysis completed after the peer review process found
that this was partially a result of more papers being submitted on blockchain topics
(over 75% of submissions) and these papers also receiving more positive reviews.
However, the resulting program led to some controversy within the community. Dis-
cussion at the conference during the general meeting affirmed that nearly all members
of the community would like to continue to see a balance of areas represented in the
program. Several ideas were proposed for continuing to attract a scientifically diverse
program on all areas offinancial cryptography.
The program ran over four days. In addition to 20-minute presentations of all
acceptedpapers,theprogrambeganwithakeynoteaddressfromAllisonNixon,Chief
Research Officer at Unit221B entitled “Fraudsters Taught Us that Identity is Broken.”
The keynote featured many interesting examples from industry on challenges with
fraud in online payments and other systems. The program concluded with a panel
discussion “Crypto engineering for the real world” organized by Ross Anderson and
featuring Jean Camp, Peter Landrock, Allison Nixon, and Alex van Someren as pan-
elists. A rump session was held on Tuesday evening featuring humorous talks and
recent results.
vi Preface
The program was noticeably affected by the emerging Covid-19 pandemic (known
simply as the novel coronavirus at the time of the conference). While there were no
knowncasesinBorneanMalaysiaatthetimeoftheevent,travelrestrictionsonChina
and Hong Kong went into effect before the conference began, which prevented a
number of members of the community from attending in person. Attendance was
estimatedtobereducedby10–20%asaresultandsevenpresentationswereconducted
remotely via pre-recorded video with authors available by video conference to answer
questions.Thegeneralconsensusattheconferencewasthatremotepresentationswent
smoothly and there was enthusiasm for increasing opportunities for virtual attendance
and presentation in future years. Fortunately, we are unaware of any attendees con-
tracting the virus as a result of attending the conference.
Overall, feedback at the conference was overwhelmingly positive despite the pan-
demic and the locationbeing far from the traditional Carribean region. We would like
tothankRafaelHirschfeldandPatrickMcCorryfortheirserviceasconferencegeneral
chairs, without whom the event would not have been possible especially in a logisti-
cally challenging year. We also thank the IFCA directors and Steering Committee for
their service.
Finally, we would like to thank the sponsors of the conference for their generous
support: our Platinum sponsors the Ethereum Foundation, Protocol Labs, and Tezos;
ourGoldsponsorChainalysis; ourSilversponsorsCalibra andIOHK;oursponsorsin
kind Blockstream, Indiana University, and Worldpay; as well as generous help and
support from the Ministry of Tourism, Arts and Culture Malaysia and the Malaysia
Convention and Exhibition Bureau.
May 2019 Joseph Bonneau
Nadia Heninger
Organization
General Chairs
Rafael Hirshfeld Unipay Technologies, The Netherlands
Patrick McCorry PISA Research, UK
Program Committee Chairs
Joseph Bonneau New York University, USA
Nadia Heninger University of California, Santa Cruz, USA
Steering Committee
Joseph Bonneau New York University, USA
Rafael Hirshfeld Unipay Technologies, The Netherlands
Andrew Miller University of Illinois at Urbana-Champaign, USA
Monica Quaintance Kadena, USA
Burton Rosenberg University of Miami, USA
Program Committee
Ittai Abraham VMware, Israel
Ross Anderson University of Cambridge, UK
Elli Androulaki IBM Research, Switzerland
Diego F. Aranha Aarhus University, Denmark
Frederik Armknecht University of Mannheim, Germany
Foteini Baldimtsi George Mason University, USA
Shehar Bano Calibra, UK
Iddo Bentov Cornell Tech, USA
Alex Biryukov University of Luxembourg, Luxembourg
Rainer Böhme Universität Innsbruck, Austria
Nikita Borisov University of Illinois at Urbana-Champaign, USA
Xavier Boyen Queensland University of Technology, Australia
Benedikt Bunz Stanford University, USA
Christian Cachin University of Bern, Switzerland
Alvaro A. Cardenas University of California, Santa Cruz, USA
Pern Hui Chia Google, USA
Jeremy Clark Concordia University, Canada
Shaanan Cohney University of Pennsylvania, USA
George Danezis Calibra, University College London, UK
Matteo Dell’Amico Symantec Research Labs, USA
Benjamin Edwards Cyentia Institute, USA
viii Organization
William Enck North Carolina State University, USA
Ittay Eyal Technion, Israel
Antonio Faonio IMDEA, Spain
Ben Fisch Stanford University, USA
Juan Garay Texas A&M University, USA
Christina Garman Purdue University, USA
Arthur Gervais Imperial College London, UK
Steven Goldfeder Cornell Tech, USA
Jens Grossklags Technical University of Munich, Germany
Marcella Hastings University of Pennsylvania, USA
Ethan Heilman Arwen, Bosten University, USA
Urs Hengartner University of Waterloo, Canada
Ryan Henry University of Calgary, Canada
Jaap-Henk Hoepman Radboud University Nijmegen, The Netherlands
Nicholas Hopper University of Minnesota, USA
Stephanie Hurder Prysm Group, USA
Alice Hutchings University of Cambridge, UK
Philipp Jovanovic EPFL, Switzerland
Ari Juels Cornell Tech, USA
Ghassan Karame NEC Laboratories Europe, Germany
Aniket Kate Purdue University, USA
Florian Kerschbaum University of Waterloo, Canada
Aron Laszka University of Houston, USA
Jacob Leshno University of Chicago, USA
Jiasun Li George Mason University, USA
Helger Lipmaa Simula UiB, Norway
Wouter Lueks EPFL, Switzerland
Loi Luu Kyber Network, Singapore
Travis Mayberry US Naval Academy, USA
Patrick McCorry PISA Research, UK
Ian Miers University of Maryland, USA
Andrew Miller University of Illinois at Urbana-Champaign, USA
Tyler Moore University of Tulsa, USA
Neha Narula MIT Media Lab, USA
Satoshi Obana Hosei University, Japan
Simon Oya University of Vigo, Spain
Andrew Poelstra Blockstream, USA
Elizabeth A. Quaglia Royal Holloway, University of London, UK
Stefanie Roos TU Delft, The Netherlands
Tim Ruffing Blockstream, USA
Reihaneh Safavi-Naini University of Calgary, Canada
Kazue Sako NEC, Japan
Max Schuchard University of Tennessee, USA
Elaine Shi Cornell Tech, USA
Yoni Sompolinsky The Hebrew University of Jerusalem, USA
Douglas Stebila University of Waterloo, Canada
Organization ix
Vanessa Teague University of Melbourne, Australia
Luke Valenta Cloudflare, Inc., USA
Marie Vasek University College London, UK
Madars Virza MIT Media Lab, USA
Marko Vukolic IBM Research, Switzerland
Nick Weaver International Computer Science Institute, University
of California, Berkeley, USA
Pieter Wuille Blockstream, USA
Eric Wustrow University of Colorado Boulder, USA
Aviv Zohar The Hebrew University of Jerusalem, Israel
Additional Reviewers
Ambrona, Miguel Krips, Toomas
Bernau, Daniel Krupp, Johannes
Boehler, Jonas Nizzardo, Luca
Bootle, Jonathan Prabhu Kumble, Satwik
Campanelli, Matteo Schanck, John
Dryja, Thaddeus Siim, Janno
Eaton, Ted Slamanig, Daniel
Ersoy, Oguzhan Szepieniec, Alan
Fauzi, Prastudy Tran, Muoi
Fischer, Andreas Tueno, Anselme
Fraser, Ashley Vesely, Noah
Fuhry, Benny Weggenmann, Benjamin
Kelkar, Mahimna Zajac, Michal