Distributed ElGamal à la Pedersen - Application to Helios
Identifieur interne : 000F47 ( Main/Exploration ); précédent : 000F46; suivant : 000F48Distributed ElGamal à la Pedersen - Application to Helios
Auteurs : Véronique Cortier [France] ; David Galindo [France] ; Stephane Glondu [France] ; Malika Izabachène [France]Source :
Abstract
Real-world elections often require threshold cryptosystems so that any t out of l trustees can proceed to tallying. This is needed to protect the confidentiality of the voters' votes against curious authorities (at least t+1 trustees must collude to learn individual votes) as well as to increase the robustness of the election (in case some trustees become unavailable, t+1 trustees suffice to compute the election result). We describe a fully distributed (with no dealer) threshold cryptosystem suitable for the Helios voting system (in particular, suitable to partial decryption), and prove it secure under the Decisional Diffie-Hellman assumption. Secondly, we propose a fully distributed variant of Helios, that allows for arbitrary threshold parameters l,t, together with a proof of ballot privacy when used for referendums. Our modification of Helios can be seen as revision of the seminal multi-authority election system from Cramer, Gennaro and Schoenmakers, upon which the original Helios system is based. As such, our work implies, to our knowledge, the first formal proof of ballot privacy for the scheme by Cramer et al. Thirdly, we provide the first open-source implementation of Helios with a fully distributed key generation setup.
Url:
DOI: 10.1145/2517840.2517852
Affiliations:
- France
- Franche-Comté, Grand Est, Lorraine (région)
- Belfort, Besançon, Metz, Nancy
- Université de Bourgogne Franche-Comté, Université de Franche-Comté, Université de Lorraine, Université de technologie de Belfort-Montbéliard
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Le document en format XML
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Grand Est</orgName><desc><address><addrLine>615 rue du Jardin Botanique 54600 Villers-lès-Nancy</addrLine><country key="FR"></country></address><ref type="url">http://www.inria.fr/nancy</ref></desc><listRelation><relation active="#struct-300009" type="direct"></relation></listRelation></org></tutelle><tutelle active="#struct-866" type="direct"><org type="laboratory" xml:id="struct-866" status="VALID"><idno type="IdRef">152639071</idno><idno type="RNSR">200412232H</idno><orgName>Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies</orgName><orgName type="acronym">FEMTO-ST</orgName><desc><address><addrLine>32 avenue de l'Observatoire 25044 BESANCON CEDEX</addrLine><country key="FR"></country></address><ref type="url">http://www.femto-st.fr</ref></desc><listRelation><relation active="#struct-242365" type="direct"></relation><relation active="#struct-300261" type="direct"></relation><relation active="#struct-300360" type="direct"></relation><relation name="UMR6174" active="#struct-441569" type="direct"></relation></listRelation></org></tutelle><tutelle active="#struct-242365" type="indirect"><org type="institution" xml:id="struct-242365" status="VALID"><idno type="IdRef">026403188</idno><idno type="ISNI">0000 0001 2188 3779 </idno><orgName>Université de Franche-Comté</orgName><orgName type="acronym">UFC</orgName><desc><address><country key="FR"></country></address><ref type="url">http://www.univ-fcomte.fr</ref></desc></org></tutelle><tutelle active="#struct-300261" type="indirect"><org type="institution" xml:id="struct-300261" status="VALID"><orgName>Université de Technologie de Belfort-Montbeliard</orgName><orgName type="acronym">UTBM</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle active="#struct-300360" type="indirect"><org type="institution" xml:id="struct-300360" status="VALID"><orgName>Ecole Nationale Supérieure de Mécanique et des Microtechniques</orgName><orgName type="acronym">ENSMM</orgName><desc><address><country key="FR"></country></address></desc></org></tutelle><tutelle name="UMR6174" active="#struct-441569" type="indirect"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno><idno type="IdRef">02636817X</idno><orgName>Centre National de la Recherche Scientifique</orgName><orgName type="acronym">CNRS</orgName><date type="start">1939-10-19</date><desc><address><country key="FR"></country></address><ref type="url">http://www.cnrs.fr/</ref></desc></org></tutelle></tutelles></hal:affiliation><country>France</country><placeName><settlement type="city">Nancy</settlement><settlement type="city">Metz</settlement><region type="region" nuts="2">Grand Est</region><region type="old region" nuts="2">Lorraine (région)</region></placeName><orgName type="university">Université de Lorraine</orgName><placeName><settlement type="city" wicri:auto="siege">Besançon</settlement><region type="region" nuts="2">Franche-Comté</region></placeName><orgName type="university">Université de Franche-Comté</orgName><orgName type="institution" wicri:auto="newGroup">Université de Bourgogne Franche-Comté</orgName><placeName><settlement type="city" wicri:auto="siege">Belfort</settlement><region type="region" nuts="2">Franche-Comté</region></placeName><orgName type="university">Université de technologie de Belfort-Montbéliard</orgName></affiliation></author></analytic><idno type="DOI">10.1145/2517840.2517852</idno></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Real-world elections often require threshold cryptosystems so that any t out of l trustees can proceed to tallying. This is needed to protect the confidentiality of the voters' votes against curious authorities (at least t+1 trustees must collude to learn individual votes) as well as to increase the robustness of the election (in case some trustees become unavailable, t+1 trustees suffice to compute the election result). We describe a fully distributed (with no dealer) threshold cryptosystem suitable for the Helios voting system (in particular, suitable to partial decryption), and prove it secure under the Decisional Diffie-Hellman assumption. Secondly, we propose a fully distributed variant of Helios, that allows for arbitrary threshold parameters l,t, together with a proof of ballot privacy when used for referendums. Our modification of Helios can be seen as revision of the seminal multi-authority election system from Cramer, Gennaro and Schoenmakers, upon which the original Helios system is based. As such, our work implies, to our knowledge, the first formal proof of ballot privacy for the scheme by Cramer et al. Thirdly, we provide the first open-source implementation of Helios with a fully distributed key generation setup.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Franche-Comté</li><li>Grand Est</li><li>Lorraine (région)</li></region><settlement><li>Belfort</li><li>Besançon</li><li>Metz</li><li>Nancy</li></settlement><orgName><li>Université de Bourgogne Franche-Comté</li><li>Université de Franche-Comté</li><li>Université de Lorraine</li><li>Université de technologie de Belfort-Montbéliard</li></orgName></list><tree><country name="France"><region name="Grand Est"><name sortKey="Cortier, Veronique" sort="Cortier, Veronique" uniqKey="Cortier V" first="Véronique" last="Cortier">Véronique Cortier</name></region><name sortKey="Galindo, David" sort="Galindo, David" uniqKey="Galindo D" first="David" last="Galindo">David Galindo</name><name sortKey="Glondu, Stephane" sort="Glondu, Stephane" uniqKey="Glondu S" first="Stephane" last="Glondu">Stephane Glondu</name><name sortKey="Izabachene, Malika" sort="Izabachene, Malika" uniqKey="Izabachene M" first="Malika" last="Izabachène">Malika Izabachène</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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