TrustedPals: Secure Multiparty Computation Implemented with Smart Cards


Benenson, Zinaida ; Fort, Milan ; Freiling, Felix ; Kesdogan, Dogan ; Penso, Lucia Draque


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URL: https://ub-madoc.bib.uni-mannheim.de/1207
URN: urn:nbn:de:bsz:180-madoc-12072
Document Type: Working paper
Year of publication: 2006
Publication language: English
Institution: School of Business Informatics and Mathematics > Sonstige - Fakultät für Mathematik und Informatik
MADOC publication series: Veröffentlichungen der Fakultät für Mathematik und Informatik > Institut für Informatik > Technical Reports
Subject: 004 Computer science, internet
Subject headings (SWD): Mehrparteienprotokoll , Chipkarte , Implementation
Abstract: We study the problem of Secure Multi-party Computation (SMC) in a model where individual processes contain a tamper-proof security module, and introduce the TrustedPals framework, an efficient smart card based implementation of SMC for any number of participating entities in such a model. Security modules can be trusted by other processes and can establish secure channels between each other. However, their availability is restricted by their host, that is, a corrupted party can stop the computation of its own security module as well as drop any message sent by or to its security module. We show that in this model SMC can be implemented by reducing it to a fault-tolerance problem at the level of security modules. Since the critical part of the computation can be executed locally on the smart card, we can compute any function securely with a protocol complexity which is polynomial only in the number of processes (that is, the complexity does not depend on the function which is computed), in contrast to previous approaches.
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Benenson, Zinaida ; Fort, Milan ; Freiling, Felix ; Kesdogan, Dogan ; Penso, Lucia Draque (2006) TrustedPals: Secure Multiparty Computation Implemented with Smart Cards. Open Access [Working paper]
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