• Annual Conference of KIPS
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• 2017.11a
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• pp.8-11
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• 2017

블록체인 기반의 가상 지갑을 만들어 그 가상 지갑 안에 현금 지폐를 쓰고 남은 거스름돈을 적립해 주는 사업 방식을 제시한다. 블록체인을 활용하여 기존의 선불카드를 이용한 거스름돈 적립의 복잡함을 없애고 간단한 알고리즘의 가상지갑에 거스름돈을 적립할 수 있다.

• Review of KIISC
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• v.29 no.4
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• pp.43-47
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• 2019

ISO/TC 307(블록체인/분산원장) 표준기술위원회는 2016년 9월 신설되었으며, 호주에서 사무국을 담당하고 있다. 영국, 미국, 프랑스, 독일등 서방국가들이 적극적으로 표준화 활동을 하며, 기업 측면에서는 IBM, MS사의 활동이 두각을 나타내고 있다. 아직 위원회의 구조와 표준화가 초기 단계에 있지만, 블록체인 기술을 기반으로 활용사례 표준 개발을 병행하여, 표준의 효용성을 높이려는 시도가 진행되고 있다. 중앙집중식의 구조에서 탈중앙구조로 패러다임 전환이 순조롭게 추진되기 위해서는 이제 학문적 기초가 필요하다는 의견이 국제컨퍼런스를 통하여 제시되었으며, 이러한 초기 단계에 한국도 적극적으로 활동하여 경쟁력 있는 특화 부분을 선점하는 전략이 필요하다고 사료되며, 지난 5월 더블린에서 개최된 블록체인/분산원장 기술위원회의 표준화 동향을 살펴본다.

• The Journal of the Convergence on Culture Technology
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• v.5 no.1
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• pp.435-441
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• 2019

While block chain technique usage is wide spread over many areas, volunteering system is another subject in use. In this paper, we propose reverse auction and block chain technique in volunteering matching system. Detailed process on each step of system are suggested. Pros and cons of our new system are also discussed.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.189-190
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• 2020

부산의 주요 핵심 산업인 항만물류산업의 경쟁력 강화는 지역경제 활성화의 필수 조건이며, 항만물류산업의 경쟁력을 강화하는데 있어 단순한 항만의 양적인 규모의 경쟁에서 질적 효율성의 문제로 전환되고 있습니다.····(중략)····.선용품 공급산업의 경쟁력 강화방안으로 해운산업, 항만산업, 물류산업, 제조업 등 산업간 정보교류를 효율적으로 활용 할 수 있는 블록체인 기반의 선용품공급업 세관신고 시스템 고도화 방안····(중략)····.블록체인 기술을 도입하여 분쟁해결 발생시 이에 대한 시간과 비용을 절약할 수 있도록 하여 글로벌시장에서의 경쟁력을 확보할 수 있도록 적극적인 도움을 줄 수 있을 것으로 기대된다.

• Annual Conference of KIPS
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• 2023.05a
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• pp.246-247
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• 2023

최근 문화 공연 수요의 증가에 따라 암표 거래도 증가하는 추세이다. 이를 해결하고자 본 논문은 블록체인 기반 티켓 거래 시스템을 제시한다. 메타마스크로 티켓 거래를 진행하며 블록체인에 거래 내역을 기록함으로써 악의적인 재판매 행위를 근절하는데 목적이 있다. 블록체인 기술을 활용해 티켓 거래 내역의 위변조 위험성을 낮추고 무결성을 보장하여 기존 티켓 거래 사이트보다 높은 신뢰성을 제공한다. 또한 티켓 재판매 시 가격을 원가 이하로 제한하고 양도자의 지갑 주소를 양수자에게 비공개하여 사이트 외 추가적인 불법 거래를 방지한다. 본 연구가 공정한 디지털 거래 환경을 조성할 것이라 기대한다.

• The Journal of Bigdata
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• v.8 no.2
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• pp.141-148
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• 2023

Recent advancements in the integration of satellite technology and the Internet of Things (IoT) have led to the development of a sophisticated network ecosystem, capable of generating and utilizing vast amounts of big data across various sectors. However, this integrated network faces significant security challenges, primarily due to constraints like limited latency, low power requirements, and the incorporation of diverse heterogeneous devices. Addressing these security concerns, this paper explores the construction of a satellite-IoT network through the application of Software Defined Networking (SDN). While SDN offers numerous benefits, it also inherits certain inherent security vulnerabilities. To mitigate these issues, we propose a novel approach that incorporates blockchain technology within the SDN framework. This blockchain-based SDN environment enhances security through a distributed controller system, which also facilitates the authentication of IoT terminals and nodes. Our paper details the implementation plan for this system and discusses its validation through a series of tests. Looking forward, we aim to expand our research to include the convergence of artificial intelligence with satellite-IoT devices, exploring new avenues for leveraging the potential of big data in this context.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.13 no.4
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• pp.298-305
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• 2020

This paper deals with the implementation of electronic voting system using permissioned block chain technology. Cases studies have recently been under way in many industrial areas to review the application of the blockchain based electronic voting system. The existing electronic voting system was easily exposed by hacking because of its centralized characteristics, making it difficult to ensure the reliability and transparency of the voting system itself. In this study, we proposed key considerations and concepts to ensure the reliability and transparency of voters and voting stakeholder by utilizing a hyperledger fabric which is nowadays widely used as a permissioned blockchain.

• Journal of Energy Engineering
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• v.27 no.4
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• pp.86-91
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• 2018

This paper is a review of accounts balancing time in small distributed power trading platform using blockchain technology. First, the national VPP energy management system using the AMI applied to this study is introduced and then the accounts balancing time and process of the cryptocurrency coin payment which based on the power generation of pro-consumer certified by power big data analysis in a test bed environment is discussed. Futhermore the configuration of a power Big Data analysis system with GPU Fast Big Data that applies MapD to current lambda architecture is also introduced.

• The Journal of the Korea institute of electronic communication sciences
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• v.17 no.1
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• pp.193-200
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• 2022

In this study, the intellectual property rights of digital contents (creations) are protected by using block chain technology that cannot be damaged or forged. So, we build a blockchain-based content sales revenue tracking system and platform that activates the transaction and distribution of digital content (creation). We developed an API server that can be used for content registration and revision history management smart contract, license management smart contract according to content purchase, content inquiry function through files and hashes, and web and APP services. Through this, it is possible to prove the relationship between the rights of the creators of digital content creations and protect the rights of the creators.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.4
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• pp.563-570
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• 2018

Existing online voting is not being used for public elections due to uncertainty about security threats, and offline voting costs a lot of money. As an alternative, blockchain is emerging. Applying blockchain technology to online voting will ensure transparency and confidentiality, because voter information and aggregate information are distributed and managed. Since a blockchain distributes the voting information, it will be more secure than existing central server - based online voting systems. If blockchain technology is applied to public elections, and the transparency and confidentiality of the voting information is guaranteed, the cost of voting will be greatly reduced. This paper tries to apply to an online voting system the Ethereum platform from among the blockchain technologies. Ethereum is a highly scalable blockchain technology that provides a smart contract based on the Solidity language to develop an online voting contract and to distribute the contract to each voter. Each voter votes on the contract that has been distributed, and the votes are distributed to other voters. The experiment verifies the consistency of the stored voting information.