Paper 2015/058
Universally Verifiable Multiparty Computation from Threshold Homomorphic Cryptosystems
Berry Schoenmakers and Meilof Veeningen
Abstract
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.
Note: Full version of the ACNS proceedings version
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Preprint. MINOR revision.
- Keywords
- multiparty computationverifiabilityFiat-Shamir heuristicthreshold homomorphic cryptosystem
- Contact author(s)
- m veeningen @ tue nl
- History
- 2015-05-20: revised
- 2015-01-26: received
- See all versions
- Short URL
- https://ia.cr/2015/058
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2015/058,
author = {Berry Schoenmakers and Meilof Veeningen},
title = {Universally Verifiable Multiparty Computation from Threshold Homomorphic Cryptosystems},
howpublished = {Cryptology {ePrint} Archive, Paper 2015/058},
year = {2015},
url = {https://eprint.iacr.org/2015/058}
}
