• Title, Summary, Keyword: Smart Contract

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Ethereum-based game platform design for revitalizing donation (기부활성화를 위한 이더리움 기반 게임 플랫폼 설계)

  • Min, Youn-A;Kim, Seo-Yoon;Lee, Seung-Soo;Lee, Won-Chang;Baek, Yeong-Tae
    • Proceedings of the Korean Society of Computer Information Conference
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    • pp.357-358
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    • 2019
  • In this paper, we propose a donation game platform using blockchain to revitalize the shrinking donation market. The platform is designed to ensure transparency and user reliability in the use of ethereum's smart-track function and to attract interest from donors and encourage continued donations by introducing games into the donation process through donor organizations to address the opaque nature of the donation and use of the funds and the result of the donation portfolio. It also develops a donation ecosystem that benefits donors, donors and sponsor companies alike by platforming them.

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A Decentralized Copyright Management Model using Mydata Concept (마이데이터 개념을 활용한 탈중앙화 저작권 관리 모델)

  • Kim, Hyebin;Shin, Weon;Shin, Sang Uk
    • Journal of Korea Multimedia Society
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    • v.23 no.2
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    • pp.262-273
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    • 2020
  • This paper analyzes the existing copyright management and copyright sharing model and discusses the limitations. It then proposes a consortium Blockchain-based copyright management model in which the service platform participates as a node, and discusses how to combine the My Data concept with Blockchain and smart contracts. Also, Blockchain-based CP-ABE is introduced and applied to the proposed model as a way for users to define access policies and store copyright data in encrypted form on the storage of the online service providers (OSP). Compared with the existing copyright management model, the proposed model allows the copyright holder to focus on copyright registration, license content design, and sharing, as the data subject. And it is expected to be able to transparently manage the usage records and the basis for the settlement of the copyrighted data that are shared and used on each platform.

Biometric Information and OTP based on Authentication Mechanism using Blockchain (블록체인을 이용한 생체정보와 OTP 기반의 안전한 인증 기법)

  • Mun, Hyung-Jin
    • Journal of Convergence for Information Technology
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    • v.8 no.3
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    • pp.85-90
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    • 2018
  • Blockchain technology provides distributed trust structure; with this, we can implement a system that cannot be forged and make Smart Contract possible. With blockchain technology emerging as next generation security technology, there have been studies on authentication and security services that ensure integrity. Although Internet-based services have been going with user authentication with password, the information can be stolen through a client and a network and the server is exposed to hacking. For the reason, we suggest blockchain technology and OTP based authentication mechanism to ensure integrity. In particular, the Two-Factor Authentication is able to ensure secure authentication by combining OTP authentication and biometric authentication without using password. As the suggested authentication applies multiple hash functions and generates transactions to be placed in blocks in order for biometric information not to be identified, it is protected from server attacks by being separate from the server.

A Study on the Effect of Block Chain Application and Legal Issue in Logistics Industry (물류산업의 블록체인 적용효과와 법적 과제에 대한 연구)

  • Yang, Jae-Hoon
    • Journal of Convergence for Information Technology
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    • v.8 no.1
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    • pp.187-199
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    • 2018
  • The purpose of this study is to find out the positive effects of the block chain when applied to the logistics industry and what legal problems should be solved to apply the block chain to the logistics industry. As a result of the study, it was found that the block chain can create the streamlining document work, increasing visibility, improving transaction reliability, activating Internet of things, and expanding smart contract. However, in order to apply the block chain to the logistics industry, have also confirmed that the scope of electronic transactions, international distribution of electronic bill of lading, and legal supplementation related to personal information protection are necessary. It is meaningful to confirm the applicability in the logistics industry, the positive effect and the legal problem, but it is necessary to study the problem from the practical point of view in the hereafter research.

WiCoin : Wireless LAN Sharing Using Block Chain Technology (와이코인 : 블록체인 기술을 이용한 무선랜 공유)

  • Kim, Woo-Seong;Ryu, Kyoung-Ho;Park, Yang-Jae
    • Journal of Digital Convergence
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    • v.17 no.1
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    • pp.195-201
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    • 2019
  • This paper proposes a blockchain system to share Wireless Local Area Network (WLAN) that recently suffers from mutual interference among increasing devices using unlicensed bands. Blockchain technology can induce cooperation from users by incentivizing them with cryptocurrency like shown in Bitcoin example. In this paper, we describe Blockchain based access mechanism in WLAN instead of conventional authentication based access. Here, users can access any WLAN access point by paying through smart contract while they also receive payment from others. In order to support real-time transaction, we apply proof-of-authority that is realized by Byzantine fault tolerant protocol instead of well-known proof-of-work that requires huge computing power and delay.

A Study on Improvement of Housing Bond Information Relay System Using Blockchain (블록체인을 활용한 국민주택채권 정보 중계시스템 개선방안 연구)

  • Nam, Jin-Seok;Yang, Hae-Sool
    • Journal of Digital Convergence
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    • v.15 no.8
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    • pp.203-212
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    • 2017
  • The National Housing Bond Information Relay System is a representative financial information relay system in which institutions are connected with center system. A centralized structure is expensive to construct and operate center, and there is a problem that all networks are disconnected when a failure occurs in the center system. In this paper, we propose the national housing bond information relay system model based on Blockchain technology that can process information safely and efficiently. The proposed model constructs a Blockchain network so that each institution that processes the national housing bond information can transmit information safely, and each institution manages the same distributed ledge by a smart contract. The proposed model can reduce the cost because it can process complicated national housing bond transaction information without a relay center, and a network usage and disk usage decreased by 1.7% and 8.53%.

A Study on the Production and Consumption Authentication Power Trading System based on Big Data Analysis using Blockchain Network (블록체인 네트워크를 이용한 빅데이터 분석 기반 생산·소비량 인증 전력 거래 시스템에 관한 연구)

  • Kim, Young-Gon;Heo, Keol;Choi, Jung-In
    • Journal of Energy Engineering
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    • v.28 no.4
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    • pp.76-81
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    • 2019
  • This paper is a review of the certification system required for various energy prosumer business models, including P2P energy trading and participation in small demand response programs, which are based on reliable production and consumption certification. One of the most important parameter in energy trading is ensuring the reliability of trading account balancing. Therefore, we studied to use big data pattern analysis based blockchain smart contract between trading partners to make its tradings are more reliable. For this purpose big data analysis system collected from the IoT AMI and a production authentication system using a private blockchain network linked with the AMI is discussed, using the blockchain smart contract are also suggested. Futhermore, energy trading system concept and business models are introduced.

Application and Policy Direction of Blockchain in Logistics and Distribution Industry (물류 및 유통산업의 블록체인 활용과 정책 방향)

  • Kim, Ki-Heung;Shim, Jae-Hyun
    • The Journal of Industrial Distribution & Business
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    • v.9 no.6
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    • pp.77-85
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    • 2018
  • Purpose - The purpose of this study is to subdivide trade transaction-centered structure in a logistics/distribution industry system to apply blockchain, to establish and resolve with which types of technology, and to provide policy direction of government institution and technology to apply blockchain in this kind of industry. Research design, data, and methodology - This study was conducted with previous researches centered on cases applied in various industry sectors on the basis of blockchain technology. Results - General fields of blockchain application include digital contents distribution, IoT platform, e-Commerce, real-estate transaction, decentralized app. development(storage), certification service, smart contract, P2P network infrastructure, publication/storage of public documents, smart voting, money exchange, payment/settlement, banking security platform, actual asset storage, stock transaction and crowd funding. Blockchain is being applied in various fields home and abroad and its application cases can be explained in the banking industry, public sector, e-Commerce, medical industry, distribution and supply chain management, copyright protection. As examined in the blockchain application cases, it is expected to establish blockchain that can secure safety through distributed ledger in trade transaction because blockchain is established and applied in various sectors of industries home and abroad. Parties concerned of trade transaction can secure visibility even in interrupted specific section when they provide it as a base for distributed ledger application in trade and establish trade transaction model by applying blockchain. In case of interrupted specific section by using distributed ledger, blockchain model of trade transaction needs to be formed to make it possible for parties concerned involved in trade transaction to secure visibility and real-time tracking. Additionally, management should be possible from the time of contract until payment, freight transfer to buyers through land, air and maritime transportation. Conclusions - In order to boost blockchain-based logistics/distribution industry, the government, institutionally, needs to back up adding legal plan of shipping, logistics and distribution, reviewing standardization of electronic switching system and coming up with blockchain-based industrial road maps. In addition, the government, technologically, has to support R&D for integration with other high technology, standardization of distribution industry's blockchain technology and manpower training to expand technology development.

Automated Classification of Unknown Smart Contracts of Ethereum Using Machine Learning (기계학습을 활용한 이더리움 미확인 스마트 컨트랙트 자동 분류 방안)

  • Lee, Donggun;Kwon, Taekyoung
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.28 no.6
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    • pp.1319-1328
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    • 2018
  • A blockchain system developed for crypto-currency has attractive characteristics, such as de-centralization, distributed ledger, and partial anonymity, making itself adopted in various fields. Among those characteristics, partial anonymity strongly assures privacy of users, but side effects such as abuse of crime are also appearing, and so countermeasures for circumventing such abuse have been studied continuously. In this paper, we propose a machine-learning based method for classifying smart contracts in Ethereum regarding their functions and design patterns and for identifying user behaviors according to them.