• Title, Summary, Keyword: 블록체인

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A Reference Model for Korea Real Estate Administration Intelligence System Using Block Chain (블록체인을 이용한 부동산종합공부시스템 참조모델)

  • Sun, Jong-Cheol;Kim, Jin Wook
    • KIPS Transactions on Computer and Communication Systems
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    • v.7 no.11
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    • pp.281-288
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    • 2018
  • The block chain, which is characterized by a distributed ledger that stores the same data in several places, has various technical features including security and stability. Due to these characteristics, various researches are being conducted on the application of the block chain. In this paper, we consider the issues to be considered for applying the block chain to the Korea Real Estate Administration Intelligence System (KRAS). Based on this, we propose a block chain reference model for KRAS including a system configuration method and a consensus algorithm.

A Study on Modified PBFT Study for Effective Convergence of IoT Big Data and Blockchain Technology (IoT 빅데이터와 블록체인 기술의 효과적 융합을 위한 수정된 PBFT연구)

  • Baek, Yeong-Tae;Min, Youn-A
    • Proceedings of the Korean Society of Computer Information Conference
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    • pp.193-194
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    • 2020
  • 블록체인의 활용이 다양해지며 블록체인을 통한 산업, 정부의 기술적용이 확산되고 있다. 특히 사물인터넷 등 빅데이터 관리를 위한 방법으로 블록체인과의 융합도 적지 않게 거론되고 있다. 사물인터넷과 같은 빅데이터를 효과적으로 관리하기 위해서는 수집 및 저장과정과 더불어 투명하고 정확한 신뢰기반의 데이터 관리가 필요하다. 현재 블록체인의 프라이빗 블록체인 플랫폼에서 가장 많이 제시되고 활용되는 합의알고리즘은 PBFT이다. PBFT의 경우 노드 증가에 따른 연산알고리즘의 과중으로 인한 속도저하가 문제가 될 수 있다. 본 논문에서는 PBFT의 합의과정에 대한 알고리즘을 수정하여 노드 증가 시에도 복잡도를 낮출 수 있는 방법을 제안하였다. 본 논문에서는 시뮬레이션을 통하여 노드 개수를 변형하며 기존 PBFT알고리즘 대비 제안 알고리즘의 우수성을 증명한다.

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A Study on Authentication Model using Blockchain (블록체인 기술을 활용한 진본인증 모형 연구)

  • Lee, Kyung-nam
    • The Korean Journal of Archival Studies
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    • no.59
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    • pp.47-78
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    • 2019
  • With the rapid changes in the digital technology, it is necessary to shift to a new paradigm corresponding to the changing environment was recognized. This study actively explores the possibility of applying new technologies for recordkeeping. This study aimed to investigate the applicability of blockchain to recordkeeping and to develop a new model for recordkeeping based on it. Through a conceptual analysis of blockchain and consideration of the recordkeeping process, a blockchain model that is suitable for the authentication of records was proposed. For this the network structure, the structure of blockchain blocks, a consensus algorithm, and recordkeeping blockchain model were designed. It also predicted potential changes in digital records management when applying blockchain. It predicted change in governance aspects to implement a horizontal cooperation system among the archives.

블록체인 국제 표준화 현황

  • Oh, Kyeong Hee
    • Review of KIISC
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    • v.27 no.5
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    • pp.14-20
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    • 2017
  • 블록체인은 금융 및 비금융을 막론하고 광범위한 응용이 예상되는 신생기술이다. 2017년 공식표준화기구의 대표격인 ISO와 ITU-T에서 블록체인 표준화가 본격적으로 개시되었다. 본 고에서는 이러한 블록체인 관련 국제 표준화 현황을 살펴 보고 향후의 전망과 이에 따른 대응 방안을 검토한다.

A Study on Application of Record Management System Block Chain Technology (기록관리시스템 블록체인 기술 적용 방안 연구)

  • Lee, Gi-yeong;Kim, Ik-han
    • The Korean Journal of Archival Studies
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    • no.60
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    • pp.317-358
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    • 2019
  • Blockchain technology has emerged as one of the key technologies of the fourth industrial revolution. Blockchain technology is characterized by being able to verify the authenticity of stored information in a block and whether it is false or falsified, cannot arbitrarily manipulate or delete a particular record, and is capable of transparent audit trail. This study is designed to explore how to apply blockchain technology to record management. For this purpose, we want to approach the code area, the physical area of the blockchain technology, to explore some of the key physical structures, and to derive the applicability of the blockchain technology. By implementing the part of 'Cloud-Record Management System', future record management system model and currently in the process of phasing out step by step, as a modular block chain, I suggest a blockchain network model that can simplify or replace various functions of the current record management process.

A Study on the Applications of Blockchain Transactions and Smart Contracts in Recordkeeping (블록체인 트랜잭션과 스마트 컨트랙트를 활용한 기록관리 적용 방안 연구)

  • Wang, Hosung;Moon, Shinhye;Han, Nungwoo
    • Journal of Korean Society of Archives and Records Management
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    • v.20 no.4
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    • pp.81-105
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    • 2020
  • This study examines the possibility of applying various recordkeeping methods through a platform built in 2019 by the National Archives of Korea. In particular, it aims to develop a way to track and store transactions using blockchain and to design and present the method of records management automation using smart contracts. In this regard, a literature review, a system analysis of CAMS and MAM, interviews with the experts, designing, implementation, and the development of the system's proof of concept were performed. These efforts resulted in the proposal of an archives and records management strategy utilizing blockchain, which guarantees transparency and accountability by preserving an audit trail on recordkeeping activities.

Blockchain-based safety MyData Service Model (블록체인 기반 안전한 마이데이터 서비스 모델)

  • Lee, Kwang Hyoung;Jung, Young Hoon
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.12
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    • pp.873-879
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    • 2020
  • The importance of data as a core resource of the 4th industrial revolution is emerging, and companies illegally collect and use personal data. In the financial sector, active research is conducted to safely manage personal data and provide better services using blockchain, big data, and AI technology. In this paper, we propose a system that can safely manage personal data by using blockchain technology, which can be used without changing the existing system. The composition of this system consists of a blockchain, blockchain linkages, a service provider, and a user (i.e., an app). Blockchain can be used regardless of its type and form, and services are provided by classifying blockchains and services in the blockchain linkages. Service providers can access personal data only after requesting and receiving delegated permission from users. Existent MyData services store all data in a user's mobile phone, so information may get leaked due to jailbreaks or rooting. But in the proposed system, personal data are stored in blockchain so information leakage can be prevented. In the future, we will study ways to provide customized services using personal data stored in blockchain.

Analysis of Blockchain Software Vulnerability against OS Command Injection Attack (블록체인 소프트웨어의 취약점을 이용한 OS 커맨드 인젝션 공격에 대한 연구)

  • Kim, Byoungkuk;Hur, Junbeom
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.29 no.2
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    • pp.309-320
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    • 2019
  • Blockchain has been developed as a key technology for many cryptocurrency systems such as Bitcoin. These days, blockchain technology attracts many people to adopt it to various fields beyond cryptocurrency systems for their information sharing and processing. However, with the development and increasing adoption of the blockchain, security incidents frequently happen in the blockchain systems due to their implementation flaws. In order to solve this problem, in this paper, we analyze the software vulnerabilities of Bitcoin and Ethereum, which are the most widely used blockchain applications in real world. For that purpose, we conduct an in-depth analysis of source code of them to detect software vulnerabilities, and examine an OS command injection attack exploiting the detected ones.

The Design and Development of a Onchain Game for Scalability Verification of Blockchain Platform (블록체인 플랫폼의 성능 및 확장성 검증을 위한 온체인 게임 설계 및 개발)

  • Jang, Kwang-Soo;Lee, Ook
    • Journal of Digital Convergence
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    • v.18 no.10
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    • pp.253-263
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    • 2020
  • Since the birth of the Ethereum in 2015, various decentralized applications (DApp) based on blockchain smart contract technology have appeared. However, CryptoKitty's case showed instability in terms of performance and scalability in real-world service environments. To solve this, a blockchain platform that developed a high transaction per second (TPS) has appeared, but there have been no environments and services to test it. Therefore, this paper intends to design and develop a game that can record the contents of all games on the chain and verify the performance and scalability of the blockchain platform through oversized transactions. The developed game generated a total of 6.3 million blocks and 8.9 million transactions through by 682 and verified the improved performance and scalability of the existing platform. Additionally, the maximum TPS was measured at 1,309 during the test period. In the future, it is expected that performance and scalability can be compared in a realistic environment through the method presented in this paper.