• Journal of Information Processing Systems
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• 제16권2호
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• pp.421-434
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• 2020

The development of digital technology has changed the lives of many people in terms of the velocity and convenience of completing tasks. This technology has also been applied to the process of voting, yet electronic voting is seldom used. The existing electronic voting scheme operates by applying various encryption algorithms. This type of electronic voting can be problematic since the administrator is given full authority. The administrator cannot always be trusted, and the contents of the ballot could be forged or tampered by a single point of failure. To resolve these problems, researchers continue to apply blockchain technology to electronic voting. Blockchain technology provides reliability and data integrity because all untrusted network participants have the same data. In this paper, we propose an electronic voting system that secures reliability by applying blockchain technology to electronic voting and ensures secret voting.

• 한국IT서비스학회지
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• 제19권3호
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• pp.101-115
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• 2020

Electronic voting is one of information technology service to handle a wide range of functions, including registration, certification, input and results of voting, using electronic technology, depending on the degree of automation. It helps voters exercise their voting rights not only for individual suffrage but also for major corporate decisions as shareholders by expressing their opinions regardless of geographical and time constraints. Such electronic voting helps open and expand voting participation, but on the contrary, it is possible to identify who voted and what kind of vote, such voting cannot guarantee confidentiality. Therefore, if blockchain technology is applied to electronic voting, it can increase the speed of processing and confidentiality by encrypting voting information. In this regard, the study aims to identify institutional issues on how electronic voting can be activated at a company's shareholders' meeting, and to find ways to overcome the limitations of existing electronic voting by utilizing the technical characteristics of blockchain. This study proposes a consortium-type blockchain-based electronic voting system to enhance the convenience and reliability of electronic voting for shareholders' meetings. In addition, this paper suggests how to enhance shareholders' profits through electronic voting at shareholders' meetings, as well as its policy measures and future improvements.

• 한국정보전자통신기술학회논문지
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• 제13권4호
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• pp.298-305
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• 2020

본 논문은 허가형 블록체인 기술을 이용한 전자투표 시스템의 구현 방안을 다룬다. 최근 국내외에서 블록체인 기반 전자투표 시스템의 적용을 검토하는 사례와 연구가 진행되고 있다. 기존의 전자투표 시스템은 주로 중앙 집중형 시스템으로 해킹의 공격 대상이 되어 투표 시스템 자체의 신뢰성과 투명성을 확보하기 어려웠다. 본 연구에서는 허가형 블록체인으로 널리 사용되는 하이퍼레저 패브릭을 활용하여 유권자와 투표 이해관계자의 신뢰성과 투명성을 확보하기 위한 주요 고려사항을 제안하고 개념을 구현하였다.

• 한국통신학회논문지
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• 제32권1C호
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• pp.86-93
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• 2007

최근 들어, 국내외에서는 투표용지 대신에 전자적 투표 장치를 이용하는 전자투표 시스템들을 개발하고 있으나 이러한 전자투표 시스템은 전자투표의 초기 단계로서 온라인 투표시스템은 아니다. 따라서 많은 암호학자들은 암호기술을 기반으로 하는 온라인 전자투표에 대한 연구를 하고 있다. 기존의 1-out-of-L 전자투표는 E1Gamal 암호 기법을 기반으로 하고 있다. 본 논문에서는 계산복잡도를 줄이기 위해, r차 잉여암호를 이용하고, E1Gamal 암호 기반의 1-out-of-L 전자투표의 계산복잡도와 제안한 1-out-of-L 전자투표의 계산복잡도를 비교 분석하였으며, 제안한 전자투표 방식이 보다 효율적임을 보여준다. 또한, 새로운 형태의1-out-of-L 전자투표의 투표-취소 기법을 제안한다. 기존의 전자투표 시스템들은 투표 후의 투표-취소 기법에 대해서 간과해 왔다. 본 논문에서는 제안한 투표-취소 기법을 위해, 기존의 r차 잉여암호의 준동형성을 확장한다. 확장된 준동형성은 프라이버시와 전체검증성을 유지하면서 투표를 취소할 수 있다.

• Journal of Multimedia Information System
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• 제3권3호
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• pp.77-84
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• 2016

The sailors on seagoing ships experience much difficulty in communicating with their families, friends or associates ashore due to communication cost or technical difficulties so that they are sometimes unable to adapt to the rapid social changes promptly. This is mainly the result of an insufficient Information and Communication Technology (ICT)-environment on their ships. To surmount such a problem, an electronic shipboard voting system that guarantees the publicness and absolute secrecy in voting process has been proposed in this paper. The system not only helps crews to catch up with up-to-date news and provides them a feeling that they are being connected to the everyday lives of the outside world, but also allows them to cast their votes based on the newly acquired information (e.g., current political or economic situations in their respective regions and etc.).

• 한국정보통신학회논문지
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• 제23권1호
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• pp.103-110
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• 2019

전자투표는 유권자에게 편리성을 제공하고, 투표 참여율을 증가시킬 수 있다는 주장에 따라 많은 연구가 이어지고 있다. 그럼에도 불구하고 아직까지 전자투표가 널리 적용되지 못하고 있다. 기존의 전자투표 시스템은 투표의 신뢰성을 완전하게 보장하지 못하고, 서버에 대한 공격으로 위조나 변조될 수 있어 보안에 대해 의문이 제기되고 있다. 따라서 본 논문에서는 이러한 전자투표 시스템의 문제점을 해결하기 위해서 블록체인 기술을 제안한다. 블록체인은 거래 데이터의 안전을 보장해 주는 특징을 가진 기술임에도 불구하고 이를 기반으로 구현한 전자투표 시스템은 많지 않다. 이러한 점에 착안하여 본 논문은 블록체인을 기반으로 하는 이더리움 환경에서 전자투표 시스템을 구축했다. 또한 보다 안전한 투표를 시행하기 위해 법적, 기술 및 운영에 필요한 과제를 제시하였다. 구축된 시스템은 기존 중앙집중식 시스템과 달리 공격으로 인한 시스템 마비나 중앙서버시스템 장악으로 인한 거래데이터의 위변조와 같은 문제점을 해결하고 시스템 안전성을 보장할 수 있다.

• ETRI Journal
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• 제43권2호
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• pp.357-370
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• 2021

The evolution of blockchain-based systems has enabled researchers to develop nextgeneration e-voting systems. However, the classical consensus method of blockchain, that is, Proof-of-Work, as implemented in Bitcoin, has a significant impact on energy consumption and compromises the scalability, efficiency, and latency of the system. In this paper, we propose a hybrid consensus model (PSC-Bchain) composed of Proof of Credibility and Proof of Stake that work mutually to address the aforementioned problems to secure e-voting systems. Smart contracts are used to provide a trustworthy public bulletin board and a secure computing environment to ensure the accuracy of the ballot outcome. We combine a sharding mechanism with the PSC-Bchain hybrid approach to emphasize security, thus enhancing the scalability and performance of the blockchain-based e-voting system. Furthermore, we compare and discuss the execution of attacks on the classical blockchain and our proposed hybrid blockchain, and analyze the security. Our experiments yielded new observations on the overall security, performance, and scalability of blockchain-based e-voting systems.

• 디지털산업정보학회논문지
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• 제9권1호
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• pp.33-42
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• 2013

Mobile voting has been considered as a promising technology, but it has not been used widely or popular enough in the world. We think this situation is caused by immature technologies of mobile voting and no agreement among people in our society. In this paper, we reviewed literature on electronic voting systems in order to find out technical issues on mobile voting system, and we also surveyed people's opinions via the Internet in order to understand what they worry about mobile voting. From the literature review, we understand that the existing electronic voting systems did not consider security, robustness, and reliability issues enough. From the survey, we also get to know that people worry about "manipulation of the result of mobile voting" mostly. Our work can help researchers on mobile voting to consider the ways or technologies that convince people of the reliability of mobile voting.

• 디지털융복합연구
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• 제10권2호
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• pp.161-169
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• 2012

선거 시스템을 관리하기 위해서는 많은 비용과 인력이 요구된다. 경제적이고 공정한 선거 시스템 구축을 위해서 전자 투표 기법의 접목은 필수적이다. 특히 스마트폰과 무선 인터넷 사용이 급증하면서 장소에 구애받지 않고 투표할 수 있는 모바일 투표에 대한 관심이 증대하고 있다. 본 논문에서는 후보자들에 의해서 선거의 공정성이 보장되는 모바일 투표 기법을 제안한다. 모바일 전자 투표를 위한 요구사항을 분석하고 법적 구속력이 있는 모바일 ID와 PKI 기반의 서명 키를 생성한다. 제안한 기법에서 투표권은 부인봉쇄 다중서명 기법을 적용하여 후보자들에 의해서 서명된다. 서명된 투표권은 개표 단계에서 모든 후보자들의 동의 없이는 검증할 수 없는 특성을 갖는다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권1호
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• pp.166-183
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• 2013

It requires a lot of costs and manpower to manage an election. The electronic voting scheme can make the election system economic and trustful. The widespread use of smart phones causes mobile voting to be a major issue. The smart phone can be used as a mobile voting platform since it can carry out many services in addition to basic telephone service. To make mobile voting practical and trustful, we analyzed two subjects of study. Firstly, the way to make a biometric based mobile ID, which has legal binding forces. In mobile voting, user identification is accomplished on line since the voter should be able to vote wherever they go. The digital ID conducts a similar role to the need for a resident card. The user's identity is bound to the resident card legally. To bind the user's identity to the smart phone, we use USIM. Biometric recognition is also needed to authenticate the user, since the user cannot prove him or her on line face-to-face. The proposed mobile ID can be reissued by means of introducing a random secret value. Secondly, the mobile voting scheme is proposed where candidates can accept election results without doubt. The goal of an election is to select a leader among two or more candidates. Existing electronic voting schemes mainly focus on the study of ballot verification accomplished by voters. These approaches are not safe against collusion attacks where candidates and the election administration center are able to collude to fabricate election results. Therefore, a new type of voting and counting method is needed where candidates can directly take part in voting and counting stages. The biometric based multi-signature scheme is used to make the undeniable multi-signed ballot. The ballot cannot be verified without the help of all candidates. If candidates accept election results without a doubt, the fairness of the election is satisfied.