Paper 2017/110

A Smart Contract for Boardroom Voting with Maximum Voter Privacy

Patrick McCorry, Siamak F. Shahandashti, and Feng Hao


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 voter’s 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 Ethereum’s official test network to demonstrate its feasibility. Also, we provide a financial and computational breakdown of its execution cost.

Note: Implementation can be found here

Available format(s)
Publication info
Published elsewhere. Financial Cryptography and Data Security 2017
Contact author(s)
patrick mccorry @ ncl ac uk
2017-02-14: received
Short URL
Creative Commons Attribution


      author = {Patrick McCorry and Siamak F.  Shahandashti and Feng Hao},
      title = {A Smart Contract for Boardroom Voting with Maximum Voter Privacy},
      howpublished = {Cryptology ePrint Archive, Paper 2017/110},
      year = {2017},
      note = {\url{}},
      url = {}
Note: In order to protect the privacy of readers, does not use cookies or embedded third party content.