e-voting Scientific Events May 2004

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Abraham Short
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1 e-voting Scientific Events May 2004

2 Trademarks All brand names and product names are trademarks or registered trademarks of their respective owners. Disclaimer This document is provided as is without warranty of any kind, either express or implied, including, but not limited to, the implied warranties of merchantability, fitness for a particular purpose, or noninfringement. This document could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the document. Cryptomathic may make improvements of and/or changes to the product described in this document at any time. Contact If you wish to obtain further information on this product or any other Cryptomathic product, you are always welcome to contact us. Cryptomathic A/S Jægergårdsgade 118 DK-8000 Aarhus C Denmark Tel.: Fax: Cryptomathic Ltd 329 Cambridge Science Park Milton Road Cambridge CB4 0WG United Kingdom Tel.: +44 (0) Fax: +44 (0) Cryptomathic GmbH Rosenheimer Str. 116 GB91-9/11 D Munich Germany Tel.: +49 (89) Fax: +49 (89) Postal Address: Cryptomathic GmbH P.O. Box Balanstr. 73 D Munich Germany 2

3 Table of Contents 1 Introduction Purpose Intended Audience Scientific Papers Presentations for Scientific Audiences...6 3

4 1 Introduction Since 2001, Cryptomathic has done intensive research in electronic voting following up on research done at the University of Aarhus and all over the world. This research combined with intelligent patenting policies and existing products of Cryptomathic relevant for e-voting has brought Cryptomathic in a quite unique position for delivering e-voting technology. In addition to the scrutiny provided by the experts of Cryptomathic, the results of the research have been published in serious scientific journals and have been presented for maximally competent scientific audiences in a number of presentations at conferences and at universities and research centers. 1.1 Purpose The purpose of this document is to provide an overview of the scientific publications and presentations performed by Cryptomathic during the course of the e-voting project. Events and publications directed at a general scientific audience, nonscientific audience or potential customers including governments have been excluded, as have trials. 1.2 Intended Audience The document is of interest to persons who wants to gain deep insight in the scientific aspects of the selected e-voting protocol and possible extensions of the protocol. It may further have some general interest to persons interested in the processes that have led to the current state of the Cryptomathic e-voting technology. This is so because thorough dissemination to relevant scientific audiences is the best guarantee that no mistakes have happened in the design of the protocols. 4

5 2 Scientific Papers The following papers have been accepted for publication in major scientific journals, books or conference proceedings: Jens Groth: Rerandomizable and Replayable Adaptive Chosen Ciphertext Attack Secure Cryptosystems. Appears in Theory of Cryptography Conference - TCC 2004, LNCS 2951, pages Jens Groth: Efficient Maximal Privacy in Boardroom Voting and Anonymous Broadcast. Appears in Financial Cryptography - FC 2004, LNCS????. Ivan Damgård and Jens Groth: Non-interactive and Reusable Non-malleable Commitment Schemes. Appears in STOC 2003, pages Jens Groth: A Verifiable Secret Shuffle of Homomorphic Encryptions. Appears in Public Key Cryptography - PKC 2003, LNCS 2567, pages Ivan Damgård, Jens Groth and Gorm Salomonsen: The Theory and Implementation of an Electronic Voting System. Appears in D. Gritzalis (Ed.), Secure Electronic Voting, Kluwer Academic Publishers, 2002, pages Jens Groth: Evaluating Security of Voting Schemes in the Universal Composability Framework, ACNS 2004, June 8-11, The following papers have appeared in preprint series etc. Jens Groth: "Extracting Witnesses from Proofs of Knowledge in the Random Oracle Model", BRICS RS-01-52, Dec Much of this work builds on work done at the University of Aarhus, Denmark, done before the start of the Cryptomathic e-voting project and of other work done at universities all over the world. Relevant papers are referenced as found appropriate in the papers listed above. 5

6 3 Presentations for Scientific Audiences Conference talks in conferences dedicated to cryptology: - Jens Groth, PKC 2003, Miami, USA, Jan. 6, A Verifiable Secret Shuffle of Homomorphic Encryptions. Appears in Public Key Cryptography. - Jens Groth: STOC 2003, San Diego, USA, June 10, 2003: Non-interactive and Reusable Non-malleable Commitment Schemes - Jens Groth: FC 2004, Key West, USA, Feb. 10, 2003: Efficient Maximal Privacy in Boardroom Voting and Anonymous Broadcast. - Jens Groth: TCC 2004, MIT, Boston, USA, Feb. 19, 2004: Rerandomizable and Replayable Adaptive Chosen Ciphertext Attack Secure Cryptosystems. - Jens Groth: ACNS 2004, Yellow Mountain, China, June 8-11, Evaluating Security of Voting Schemes in the Universal Composability Framework. Talks at Universities and Research Institutions (only talks dedicated entirely to security topics from the e-voting activities with a targeted audience of experts in relevant fields are included): - Vincent Rijmen, "Electronic Voting, e-vote", University of Leuven, Belgium, COSIC (Computer Science and Industrial Cryptography) seminar. - Jens Groth: "Secure Voting", BRICS, University of Århus, Denmark, Nov Jens Groth: "Malleable Commitments", BRICS, University of Århus, Denmark, May Jens Groth: "A Verifiable Secret-Shuffle of ElGamal Ciphertexts", Weizmann Institute, Israel, Oct Jens Groth: "Rerandomizable and Replayable Adaptive Chosen Ciphertext Secure Encryption", BRICS, University of Århus, Denmark, Apr Jens Groth: "Efficient Maximal Privacy in Boardroom Voting and Anonymous Broadcast", BRICS, University of Århus, Denmark, Feb Jens Groth: "Rerandomizable and Replayable Adaptive Chosen Ciphertext Attack Secure Cryptosystems", Universitat Polytècnica de Catalunya, Spain, Mar Gorm Salomonsen, Secure Electronic Voting and Number Theory, Max Planck Institut für Mathematik, Bonn, Germany, Maj Invited talks to conferences not dedicated to cryptology: - Gorm Salomonsen: "Protection Against Hackers on Client Computers for e-voting Systems", Trustbus 2002, Aix-en-Provence, DEXA-workshop. (The talk was given by Jens Groth instead of Gorm Salomonsen.) 6

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