Cryptology ePrint Archive: Report 2017/110

A Smart Contract for Boardroom Voting with Maximum Voter Privacy

Patrick McCorry and Siamak F. Shahandashti and Feng Hao

Abstract: We present the first implementation of a decentralised and self-tallying internet voting protocol with maximum voter privacy using the Blockchain. The Open Vote Network is suitable for boardroom elec- tions and is written as a smart contract for Ethereum. Unlike previously proposed Blockchain e-voting protocols, this is the first implementation that does not rely on any trusted authority to compute the tally or to protect the voterís privacy. Instead, the Open Vote Network is a self- tallying protocol, and each voter is in control of the privacy of their own vote such that it can only be breached by a full collusion involving all other voters. The execution of the protocol is enforced using the consensus mechanism that also secures the Ethereum blockchain. We tested the implementation on Ethereumís official test network to demonstrate its feasibility. Also, we provide a financial and computational breakdown of its execution cost.

Category / Keywords: implementation / evoting open vote network blockchain ethereum smart contracts cryptography

Original Publication (in the same form): Financial Cryptography and Data Security 2017

Date: received 10 Feb 2017

Contact author: patrick mccorry at ncl ac uk

Available format(s): PDF | BibTeX Citation

Note: Implementation can be found here

Version: 20170214:160007 (All versions of this report)

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