Universally verifiable multiparty computation from threshold homomorphic cryptosystems

B. Schoenmakers, M.G. Veeningen

Onderzoeksoutput: Boek/rapportRapportAcademic

21 Citaten (Scopus)
2 Downloads (Pure)


Multiparty computation can be used for privacy-friendly outsourcing of computations on private inputs of multiple parties. A computation is outsourced to several computation parties; if not too many are corrupted (e.g., no more than half), then they cannot determine the inputs or produce an incorrect output. However, in many cases, these guarantees are not enough: we need correctness even if /all/ computation parties may be corrupted; and we need that correctness can be verified even by parties that did not participate in the computation. Protocols satisfying these additional properties are called ``universally verifiable''. In this paper, we propose a new security model for universally verifiable multiparty computation, and we present a practical construction, based on a threshold homomorphic cryptosystem. We also develop a multiparty protocol for jointly producing non-interactive zero-knowledge proofs, which may be of independent interest. Keywords: multiparty computation, verifiability, Fiat-Shamir heuristic, threshold homomorphic cryptosystem
Originele taal-2Engels
Aantal pagina's32
StatusGepubliceerd - 2015

Publicatie series

NaamCryptology ePrint Archive


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