This paper discusses the modeling of an e-voting system for the Indonesian Presidential Election using Ethereum Blockchain and Smart Contract technology. In Indonesia, the election in which the people elect a presidential candidate directly took place in 2004. However, the voting procedure has never changed since then. The Indonesian Parliament has discussed using e-voting in early 2008 to minimize fraud and accelerate counting and data recapitulation. In the current system, Ethereum blockchain is used as the solution to minimize fraud in the election process. Ethereum blockchain is a distributed ledger where every vote accepted must be validated and verified by every node. There is a smart contract feature in Ethereum, which functions as a public notary in the system that records and proves the credibility of each vote. For supporting of government’s seriousness in developing the e-voting system in Indonesia, this study successfully designed the e-voting system by using Ethereum blockchain technology and smart
contract as a security benchmark and utilizing the data of E-KTP as voter’s unique identification. However, further enhancement in the supporting technology would be needed in order to be able to implement the proposed design system.

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A. J. Tjahajadi, Vivian, and T. H. Rochadiani, “Ethereum Blockchain and Smart Contract Modelling For Presidential E-Voting System in Indonesia,” International Journal of Technology and Engineering Studies, vol. 4, no. 2, pp. 50-56, 2018.