• Convergence Security Journal
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• v.23 no.4
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• pp.3-15
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• 2023

As remote services and remote work become commonplace, the use of the Metaverse has grown. This allows transactions like real estate and finance in virtual Second Life. However, conducting economic activities in the Metaverse presents unique security challenges compared to the physical world and conventional cyberspace. To address these, the paper proposes solutions centered on authentication and privacy. It suggests improving data preprocessing based on Metaverse data's uniqueness and introduces a new authentication service using NFTs while adhering to W3C's DID framework. The system is implemented using Hyperledger Indy blockchain, and its success is confirmed through implementation analysis.

• Knowledge Management Research
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• v.23 no.1
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• pp.149-164
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• 2022

This paper analyzes the independent financial advisory business that is not yet active in Korea and proposes a plan to activate the independent financial advisory business using fintech technology. A bill was enacted in 2017 for the domestic independent financial advisory business, but it has not been activated much until now for various reasons. Although existing studies have proposed solutions in various ways, there is no clear solution yet. This paper proposes a new method of revitalizing the independent financial advisory business through fintech technology using the trust system that has recently attracted attention. Digital securities fintech technology using blockchain distributed ledger technology presents new possibilities in the real estate and music copyright markets, and related fintech venture companies continue to emerge in Korea. By combining these digital securities fintech technologies and the business process of ETF, a method was derived so that independent financial advisors can have their own financial products. The proposed model is more decentralized than the existing financial product sales structure, and presents the possibility of a protocol economy through a structure close to a private blockchain while complying with the existing financial order. This paper is meaningful in that it presented new solutions to completely different markets from information convergence perspectives on two completely different markets, and we hope that more business solutions will emerge through knowledge management activities that converge various perspectives in the future.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.24 no.6
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• pp.786-794
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• 2020

For systematic pet management, the pet registration system has established. It makes the owner of the pet is given greater responsibility through the pet registration system but it also provided with welfare. One of the advantages of the pet registration system is that prepare system what return to owner quickly and safety through information inquiry when the pets are lost. But there are some conflict with the law in the information inquiry, so it occurs interfere the system. In this paper, we propose using the Smart Contract to finding the missing animal effectively. Proposed method discloses only the partially information. Thus it will be eliminated conflict parts, and increases the information accessibility to increase the number of people who can inquiry information. In addition, keeping the RFID inquired feature for compatible with the existing system. The smart contract querying enables quickly and precision access to information. Lastly, compare the proposed method with existing method to see the improvement.

• Journal of Navigation and Port Research
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• v.46 no.6
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• pp.501-508
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• 2022

The flow of global digitalization is leading to the emergence of a decentralized system environment based on blockchain or distributed ledger technology in the fields of economy, identity authentication, and logistics. Accordingly, a requirement that public services be searchable from several decentralized maritime service registries (MSRs) has been derived in terms of the discoverability of e-navigation services. This study describes a decentralized MSR environment composed of the MSR ledger and multiple local MSRs, and it has implemented a service search system that can search global e-navigation services in the environment through a web browser. This system is a decentralized application that dynamically generates service attributes, geometry information, and free text queries, and that provides users with relevant MSR and service access information from search results that are registered in the MSR ledger. In this study, we tested the established decentralized MSR environment and the system that performs service search within that environment, and we discussed its advantages and limitations.

• Smart Media Journal
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• v.10 no.1
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• pp.88-98
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• 2021

As blockchain technology has emerged as a security issue for IoT, technology which integrates block chain into IoT is being studied. In this paper is a research concerning token-based IoT service access control technology for data sharing, which propose a possessor focused data sharing technic by using the permissioned blockchain. To share IoT health data, a Hyperledger Fabric Network consisting of three organizations was designed to provide a way to share data by applying different access control policies centered on device owners for different services. In the proposed system, the device owner issues access control tokens with different security levels applied to the participants in the organization, and the token issue information is shared through the distributed ledger of the HFN. In IoT, it is possible to lightweight the access control processing of IoT devices by granting tokens to service requesters who request access to data. Furthmore, by sharing token issuance information among network participants using HFN, the integrity of the token is guaranteed and all network participants can trust the token. The device owners can trust that their data is being used within their authorized rights, and control the collection and use of data.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.250-253
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• 2017

최근 모바일 결제 시장의 규모가 2015년 45억 달러에서, 2016년 62억 달러로 성장하며, P2P 거래량도 함께 증가하고 있다. 또한, P2P 결제 시장에 페이팔, 비자와 같은 온라인 결제 업체와 대형은행 뿐만 아니라, 페이스북, 구글, 애플, 삼성 등 IT회사들도 참여하고 있다. 안전하고 편리한 P2P 결제를 위해 다양한 거래 방식이 연구되고 있지만, 다양한 기업 및 은행들의 참여로 인해 서로 다른 방식으로 사용자들이 불편을 겪고 있으며, 모바일 환경의 특성으로 인해 많은 보안위협들이 발생하고 있는 실정이다. 이에 따라, 모바일 환경에서의 P2P 결제를 고려한 통합적인 보안 기술이 개발되어야 하며, 민감 정보라고 할 수 있는 사용자의 계좌번호, 금융거래 관련 정보 등을 보호하기 위한 기술이 필수적이다. 따라서 기존 은행권의 P2P 거래 방법의 문제점을 분석하고 블록체인 시스템과 DHT에 대해 분석한 후, P2P 결제 환경에 적합한 안전한 블록체인 기반 금융 거래 시스템을 연구함으로써, P2P 거래 환경의 안전성을 향상시키고자 한다.

• Journal of the Korea Convergence Society
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• v.8 no.11
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• pp.57-62
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• 2017

With various sensors and communications capabilities, the Internet is growing larger as the internet can communicate with the Internet. Given the growing vulnerability of the internet market, the development of security and security is increasing, and the development of the internet is actively evolving and the development of the internet is actively being carried out. In particular, it is required to introduce lightweight and secure authentication schemes, especially those that are difficult to use due to the difficulty of using authentication schemes. Thus, the safety of the secure authentication system of the Internet is becoming very important. Therefore, in this thesis, we propose certification technologies on secure objects to ensure correct, safe communication in the context of the internet context.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.10a
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• pp.409-411
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• 2018

기존에 게임 업계에서는 데이터베이스 관리를 위해 중앙에 집중된 서버 관리 시스템을 사용해 왔다. 때문에 계정 도용 등의 부정사용이나 관리 상의 사고 등에 취약한 모습을 보여 왔다. 현재는 사고 발생한 경우 주로 서버 전체를 복구하는 등의 조치를 위하여 문제를 보완해 왔는데, 백업 과정에서 문제가 발생하면 복구 불가능한 손실이 발생할 수밖에 없다. 이에 본 연구에서는 앞서 말한 사고로 인해 데이터가 손실되더라도, 손실된 데이터를 복구할 방법으로 블록체인 기술을 활용해보고자 하였다. 블록체인 기술을 활용하여 게임 시스템 속 데이터베이스의 일부를 분산 저장하는 방법을 실험해 봄으로서 앞서 제기한 문제들을 해결해 보고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.737-741
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• 2019

최초의 암호화폐인 비트코인과 동시에 등장한 블록체인 기술은 시대를 지나며 발전을 거듭하여 현재는 많은 사람들의 관심을 이끄는 기술이 되었다. 블록체인은 내용을 손쉽게 변경할 수 없는 특징을 지니며 그에 따라 강한 신뢰도를 지니게 된다. 이러한 특징으로 인해 블록체인은 암호화폐 뿐만 아니라 다양한 분야에서 사용되기 시작했다. 우리는 본 특징을 활용하여 블록체인 기반의 애완동물 등록제를 제안한다. 현재 애완동물 산업은 규모가 상당히 거대하며 애완동물은 주인에게 강한 책임이 주어진다. 국내에서는 동물등록제를 통해 동물을 관리하지만 다른 법령과 상충되는 부분 때문에 의미가 퇴색하며 실효성에 이의가 제기되고 있다. 블록체인을 활용한 동물등록제는 부분적으로 공개된 환경에서 정보를 공유하며 분양 등의 사유로 주인이 변경되었을 경우 이를 손쉽게 추적할 수 있는 기반을 제공한다. 따라서 현재 동물등록제의 단점을 크게 해소할 수 있을 것으로 예상되며 다양한 장점을 지니기에 제안하는 바이다.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.10a
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• pp.459-460
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• 2019

최근 블록체인의 안정성이 화제가 됨에 따라 블록체인을 응용한 시스템 적용을 통한 기록의 무결성을 보장하는 기법이 대두되고 있다. 특히, 사용자간의 현금을 거래하는 거래 시스템은 타 시스템과 비교하여 거래 기록의 무결성이 더욱 강조된다. 본 논문에서는 거래 시스템의 무결성을 보장하기 위하여 블록체인을 적용한 여러 거래 시스템을 소개한다.