• Title, Summary, Keyword: 블록체인

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Proposal of A Transaction Structure to Improve Compatibility of Blockchain regarding Post-Quantum Digital Signatures (블록체인의 양자 내성 전자서명 호환성을 증대하기 위한 트랜잭션 구조 제안)

  • Kim, Mee Yeon;Lee, Jun Yeong;Yoon, Kisoon;Youm, Heung Youl
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.30 no.1
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    • pp.87-100
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    • 2020
  • Researches on Post-quantum blockchain, which is a synthesis of blockchain and post-quantum cryptography[1], are relatively unrevealed areas but have needs to be studied with the regard to the quantum computers. However there could be several fundamental problems, e.g. unsustainably large size of public key and signature, or too lengthy time for sign and verification, if any post-quantum cryptography is adopted to the existing blockchain to implement post-quantum blockchain. Thus, a new method was proposed in this paper that produces fixed length of references for massive signatures and corresponding public keys to enable relatively lightweight transactions. This paper proposed the mechanism that included a new transaction structure and protocols, and demonstrated a post-quantum blockchain that the proposed mechanism was adopted. Through this research, it could enhance compatibility of blockchain regarding post-quantum digital signature, possibly reducing weights of the whole blockchain.

A Study on the Blockchain-based System Authentication Method (블록체인 기반 시스템 인증 방법에 대한 연구)

  • Kim, Sunghwan;Kim, Younggon
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.20 no.1
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    • pp.211-218
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    • 2020
  • Recently, with the advent of blockchain technology, attempts to apply this technology to existing systems are increasing. By using the blockchain technology consensus ledger and smart contract, it is necessary to distribute certificates to various fields that require documents, attestation, authentication, verification, etc. We are studying methods using hash operation, blockchain, etc., but it is difficult to spread the technology as it has not yet reached the stage of commercialization. In this paper, user device registration authentication algorithm, blockchain-based question and answer authentication algorithm, certificate issuance, verification process and encryption algorithm, and server-side authentication for easy application in blockchain based business platform environment We proposed a blockchain-based system authentication method using four algorithms.

An Exploratory Study on the Factors Determining Acceptance of Blockchain-Based Financial Platform by Gender (블록체인 기반 금융 플랫폼의 성별 수용의도 결정요인에 관한 탐색 연구)

  • Kim, Si-Wook;Park, Hyeon-Suk
    • Journal of Digital Convergence
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    • v.18 no.3
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    • pp.139-147
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    • 2020
  • In the fourth revolution resulting from ICT convergence, Blockchain-based platform is being applied to various fields. This trend is expected to become stronger in the future. This study aims to explore several factors pertaining to user acceptance of Blockchain-based financial platform. It is important for finance business managers and blockchain technical managers to verify the user's willingness to accept the blockchain. In this study, the factors determining the acceptance of blockchain-based platform we explore are innovation, convenience, security and preference. Based on the results of the survey, 465 users(male 262, female 212) completed the questionnaire, a structural equation analysis was used in order to analyze the blockchain's users acceptance framework. Through the results we were able to identify and validate the differences in innovation and convenience by gender as well as the factors determining the acceptance of blockchain-based financial platform.

Study on Improvement and Correlation of Blockchain and Right to be Forgotten (잊혀질 권리와 블록체인의 상관관계 및 개선방안 연구)

  • Heo, Jae-Wook;Kim, Sung-Soo;Kang, Jeong-Ho;Jun, Moon-Seog
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.231-234
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    • 2018
  • 4차 산업혁명을 주도하는 신기술인 블록체인은 블록체인 네트워크에 속한 모두가 신뢰성을 가질 수 있는 새로운 형태의 탈중앙화 P2P 플랫폼이다. 2018년 기존 개인정보 보호 지침을 대체하는 GDPR이 발효되어 다양한 부분의 개인정보 보호에 법적인 영향을 미치게 되었다. 블록체인 또한 GDPR의 법적 규제를 피할 수 없게 되었고, 블록체인에서 잊혀질 권리를 충족시키기 위해 정보주체의 요청 시 민감한 개인정보를 삭제할 수 있어야 하는 필요성이 요구되었다. 본 연구에서는 기존 블록체인 시스템에서 잊혀질 권리를 준수할 개선방안을 제안한다.

Blockchain Beyond Bitcoin (비트코인 후 블록체인)

  • Hong, S.Y.;Cho, S.R.;Kim, S.H.
    • Electronics and Telecommunications Trends
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    • v.32 no.1
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    • pp.72-81
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    • 2017
  • 2008년, Satoshi Nakamoto라는 가명을 쓰는 신원미상의 사람(들) 혹은 단체가 비트코인을 소개하였다. 그 이후, 현재 비트코인의 총액은 10억달러 이상에 달한다. 비트코인을 지탱하는 기술인 블록체인에 의해 이론적으로 비트코인은 거의 조작이 불가능하며 거의 영구적으로 기록에 남게 된다. 이 획기적인 기술로 인해 비트코인 이 후 약 700개가 넘는 암호화폐가 생겨났으며, 암호화폐뿐만이 아닌 금융권/비금융권, 정부기관 등 많은 도메인에서 블록체인 기술이 도입되어 가고 있다. 비트코인 이후 가장 대표적인 블록체인 기반의 프로젝트로는 튜링 완전한 컴퓨팅 기능이 있는 이더리움이 있다. 이 튜링 완전한 컴퓨팅 기능으로 인해 이더리움 상에서 투명하게 데이터 저장 및 프로그램 실행을 할 수 있다. 이로 인해 이더리움을 이용한 많은 혁신적인 이용 사례가 생겨났다. 본고에서는 비트코인 후 블록체인의 기술을 이더리움 중심으로 소개하며 해결해야 할 기술적 이슈들과 동향에 관해 분석한다. 그리고 현재 이더리움 외에 개발되어오는 블록체인에 대해 간략히 살펴본다.

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사물인터넷 서비스 연동을 위한 블록체인 아키텍처

  • Choi, Jongseok;Heo, Shinwook;Kim, Howon
    • Review of KIISC
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    • v.28 no.5
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    • pp.20-25
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    • 2018
  • 본 논문에서는 사물인터넷 서비스와 블록체인 플랫폼간의 연동을 위한 아키텍처를 제안한다. 블록체인은 다양한 산업분야에서 데이터 신뢰성 및 안전성 측면에서의 효율성을 제공한다. 반면에 데이터 쓰기 및 읽기에 대한 낮은 성능 때문에 실제 서비스 적용하기 어렵다. 특히 사물인터넷 서비스와 같은 다량의 데이터가 발생하는 분야에서는 블록체인을 실질적으로 적용하기 어렵지만, 사물인터넷은 프라이버시 및 데이터 보안 측면에서 많은 보안 문제를 야기할 수 있는 분야로써, 블록체인을 통한 데이터 추적 및 신뢰성 보안을 필수적으로 요구된다. 본 논문에서는 이와 같이 실시간성과 신뢰성을 보장하기 위한 사물인터넷 연동형 블록체인 플랫폼 아키텍처를 소개한다. 실시간성을 유지하기 위해서 단일 피어 검증을 통한 실시간 데이터 관리를 활용하며, 신뢰성 유지를 위해서 합의를 통한 분산원장을 활용한다. 단일 피어 검증 데이터는 합의 과정을 거치기 이전에 데이터를 수신받은 단일피어가 분산원장과 별도의 상태 데이터베이스를 통해 실시간 데이터를 저장하여 실시간 서비스에 제공한다.

Domastic Blockchain Legislation and Policy Analysis and the Limitations Deriving and Present Improvement Points (국내 블록체인 법제 및 정책 분석과 한계점 도출 및 향상점 제시 -산업 활성화와 정보보호 중심으로-)

  • An, Myeonggu;Park, Yongsuk
    • Journal of Convergence for Information Technology
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    • v.9 no.9
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    • pp.44-51
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    • 2019
  • Recently, various platforms utilizing blockchains have appeared. In order to develop the blockchain, it is required to improve related laws and institutions. In this respect, we analysis of the laws and systems related to domestic blockchains, draw out the limitations, and suggest directions for improvement. The research method was analyzed the literature and related laws through literature review. It is difficult to analyze the whole law and system at one time, so we examined the necessary laws and systems to revitalize the blockchain. It is confirmed that legal improvement is needed on the scope of electronic transactions and electronic financial transactions, electronic commerce, digital signatures, import and export, personal information protection, blockchain industry promotion and research. Through this, we expect a balanced development of effective blockchain revitalization and protection of national fundamental rights. Individual studies on the legal provisions and systems for each item in the future can be conducted.

Artificial Intelligence and Blockchain Convergence Trend and Policy Improvement Plan (인공지능과 블록체인 융합 동향 및 정책 개선방안)

  • Yang, Hee-Tae
    • Informatization Policy
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    • v.27 no.2
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    • pp.3-19
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    • 2020
  • Artificial intelligence(AI) and blockchain are developing as the core technology leading the Fourth Industrial Revolution. However, AI is still showing limitations in securing and verifying data and explaining the evidence for the results, and blockchain also has some drawbacks such as excessive energy consumption and lack of flexibility in data management. This study analyzed technological limitations of AI and blockchain and convergence trends to overcome them, and finally suggested ways to improve Korea's related policies. Specifically, in terms of R&D reinforcement, we proposed 1) mid- and long-term AI /blockchain convergence research at the national level and 2) blockchain-based AI data platform development. In terms of creating an innovative ecosystem, we also suggested 3) development of AI/blockchain convergence applications by industry, and 4) Start-up support for developing AI/blockchain convergence business models. Lastly, in terms of improving the legal system, we insisted that 5) widening the application of regulatory sandboxes and 6) improving regulations related to privacy protection is necessary.

Trends of Block Chain Cryptography in Wireless Mobile Security Environments (무선모바일 보안 환경에서 블록체인 암호기술의 동향)

  • Hong, Dong-sung;Cho, Young-bok
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.67-70
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    • 2019
  • Blockchain, which emerged with the development of IT technology, has emerged as a new technology in security in recent years, although it has only been known as a technology associated with digital currencies, such as bitcoin. In particular, various studies have been conducted involving biometric technology and blockchain in the security of the mobile environment, and blockchain-based certifications between different devices are also presented in the IoT base of the wireless mobile environment. In this paper, we want to analyze the trends that are currently being applied to various wireless mobile environments and set up guidelines for future blockchain research.

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Issues in the Blockchain-Based Health Care Industry (블록체인기반 의료분야의 문제해결과 이슈)

  • Woo, Sung-hee;Lee, Yong-ju;Cho, Young-bok
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.363-366
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    • 2019
  • Blockchain technology is a new paradigm that will change existing business processes and has a significant impact on all industries, not just on specific industries. The medical industry also expects the impact of blockchain technology to be very significant. I think blockchain technology should be applied in the medical industry because the medical industry has the problem of information asymmetry due to the structural characteristics of a centralized system composed of hospitals. However, no one can be sure that the value of blockchain technology is absolutely right, and absolute trust should be avoided. Blockchain technology provides many limitations to the process in which blockchain technology is applied in the medical industry, as it can be seen as still immature in terms of security and scalability. Therefore, we analyze the application cases of blockchain technology in the medical field, current problems in the medical field, solutions and issues through Blockchain.

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