• Title, Summary, Keyword: Smart Contract

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A Study on the Applications of ICT/IoT for Jeju Haenyeo Culture, an UNESCO Intangible Cultural Heritage

  • Yoo, Jae Ho;Jung, Yeon Kyu
    • Journal of Information Technology Services
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    • v.16 no.4
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    • pp.213-222
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    • 2017
  • The advancement of ICT is changing every field of life. It becomes possible with the penetration of personalized devices, that is, smartphone. The boom of IoT will come when there exist diversified and personalized services. In general, we might admit that it is needed that the more privatized services than the overall serviced. Jeju Island is the only one special self-governing province in Republic of Korea and deserves to be proud of the unique culture from its long historical background. One of the very regional culture which performs by women divers, Haenyeo activity or culture, was registered as Intangible Cultural Heritage. When authors were researched Jeju Haenyeo as a worthy reserving service, we recognized that it has never considered to use any point of ICT/IoT yet. Because IoT holds the high potentiality to create any service scenario between interesting groups. We will design a few services for Haenyeo which covers their job territory or daily life, adopts up-to-date technology or method such as sensored network, smart contract and App/Web. In this paper, we intent to show the simplicity and easiness of the application of IoT not to much inconspicuous target. So, we suggest a specialized IoT service for the reservation and promotion of Haenyeo Culture. This service would be composed of sensors, IoT network and App/Web at home and office. This service can be used among interesting groups : Haenyeo, policy maker, manufacturer, service provider and culture consumer.

Technology and Policy for Blockchain-based Spectrum Sharing (블록체인 기반의 전파 공유 기술과 전파 정책)

  • Shin, Na Yeon;Nam, Ji-Hyun;Choi, Ye Jin;Lee, Il-Gu
    • Journal of Digital Convergence
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    • v.17 no.10
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    • pp.13-21
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    • 2019
  • The restricted network or the unbalanced distribution of spectrum is causing the problems of lack of spectrum resources and deterioration of the service quality. In addition, the existing centralized radio sharing method has not been a fundamental solution for radio sharing and is inefficient in terms of cost, convenience, and security. In this paper, we propose a blockchain-based spectrum sharing as a low-cost, trustworthy, high-efficiency platform that can distribute and share spectrum resources, and propose policies to realize this. In the spectrum sharing platform, spectrum information about Wi-Fi AP and LTE mobile hotspot is registered in the blockchain, and spectrum sharers and users can conclude peer-to-peer spectrum sharing contract quickly and efficiently through smart contract. The pay for the shared spectrum resources and reward for spectrum quality management open platform ecosystem to activate the circulation-sharing and it can provide a convenient and efficient public wireless infrastructure.

The Impact of Blockchain Technology on the Music Industry

  • Kim, Kenneth Chi Ho
    • International journal of advanced smart convergence
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    • v.8 no.1
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    • pp.196-203
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    • 2019
  • We have reviewed the potential impact of blockchain technology on the music industry by analyzing the views of academia and the industry experts. The music industry had rapid changes from the physical market to the digital market in the past decades. The consumers download and stream music online and mobile during the digital dominant market. While streaming music has been recently growing at a fast rate, fair distribution of revenue to the artists continues to be an issue. Some industry experts believe that the issue of fair distribution of revenue to the artist may be resolved using blockchain technology, while some are skeptical about the application or the duration of impact. The blockchain may enhance speedier payment using smart contracts, provide additional revenue and promote the music if excellent fan support is achieved. The positive impact on the music industry may only be possible if there are detailed consideration of the industry and careful understanding of the customers.

Implementing Blockchain Based Secure IoT Device Management System (블록체인 기반 안전한 사물인터넷 장치 관리 시스템 구현)

  • Kim, Mihui;Kim, Youngmin
    • Journal of IKEEE
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    • v.23 no.4
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    • pp.1343-1352
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    • 2019
  • To manage the Internet of Things(IoT) Network, which consists of a large number of various devices, a secure and automatic method of strengthening the IoT network is being proposed. Blockchain has a 'smart contract' element of autonomous execution method, which is emerging as a way to not only exchange data quickly without mediators but also securely and automatically manage processes between IoT devices. In this paper, we implement a prototype of the entire IoT device management system based on the EOSIO with DPoS(Distributed Proof of Stake)-based blockchain structure, proposed as a prior study, including the user application DApp(Decentralized Application) and the actual IoT devices (Raspberry Pi-based device, and smart lamp) that interact with the blockchain platform. We analyze the benefits of the system and measure the time overhead to show the feasibility of the system.

Academic Certification Service Based on Modifiable smart contract (수정 가능한 스마트 컨트랙트 기반의 학력인증서비스)

  • Jun, Sae-Hee;Kim, Hyung-Jong
    • Proceedings of the Korea Information Processing Society Conference
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    • pp.306-308
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    • 2019
  • 기존의 학력인증 서비스는 학교에 직접 방문하거나, 온라인을 통해 종이 증명서를 발급받는다. 하지만 학력인증을 블록체인에 기록하여, 인증 서비스의 비용을 줄이고 절차를 간소화하고자 한다. 더불어, 디지털 증명서를 블록체인에 등록하여 발급해온 증명서의 진위 여부를 확인하는 체제가 잘 갖춰지지 않은 곳에서도 재확인이 필요 없는 서비스를 제공하고자 한다. 블록체인에 증명서를 등록하는 중요한 기능은 '스마트 컨트랙트'를 통해 이루어진다. 매년 졸업요건이 변경된다는 점을 고려하면 스마트 컨트랙트에서 블록체인에 학력인증이 등록되는 조건의 업데이트는 필수불가결이다. 하지만 새로운 스마트 컨트랙트를 배포하는 식의 컨트랙트 업데이트는 여러 문제점들이 있다. 이를 해결하고자 본 논문에서는 proxy contract를 이용한 학력인증 서비스 시스템의 설계를 다루고자 한다.

BSSSQS: A Blockchain-Based Smart and Secured Scheme for Question Sharing in the Smart Education System

  • Islam, Anik;Kader, Md Fazlul;Shin, Soo Young
    • Journal of information and communication convergence engineering
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    • v.17 no.3
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    • pp.174-184
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    • 2019
  • In this study, we present a new scheme for smart education utilizing the concept of a blockchain for question sharing. A two-phase encryption technique for encrypting question papers (QSPs) is proposed. In the first phase, QSPs are encrypted using a timestamp, and in the second phase, previously encrypted QSPs are encrypted again using a timestamp, salt hash, and hash from the previous QSPs. These encrypted QSPs are stored in a blockchain along with a smart contract that helps the user to unlock the selected QSP. An algorithm is also proposed for selecting a QSP for the exam that randomly picks a QSP. Moreover, a timestamp-based lock is imposed on the scheme so that no one can decrypt the QSP before the allowed time. Security analysis is conducted to demonstrate the feasibility of the proposed scheme against different attacks. Finally, the effectiveness of the proposed scheme is demonstrated through implementation, and the superiority of the proposed scheme over existing schemes is proven through a comparative study based on different features.

A Study on EV Charging Scheme Using Load Control

  • Go, Hyo-Sang;Cho, In-Ho;Kim, Gil-Dong;Kim, Chul-Hwan
    • Journal of Electrical Engineering and Technology
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    • v.12 no.5
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    • pp.1789-1797
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    • 2017
  • It is necessary to charge electric vehicles in order to drive them. Thus, it is essential to have electric vehicle charging facilities in place. In the case of a household battery charger, the power similar to that consumed by a household with a basic contract power of 3kW is consumed. In addition, many consumers who own an electric vehicle will charge their vehicles at the same time. The simultaneous charging of electric vehicles will cause the load to increase, which then will lead to the imbalance of supply and demand in the distribution system. Thus, a smart charging scheme for electric vehicles is an essential element. In this paper, simulated conditions were set up using real data relating to Korea in order to design a smart charging technique suitable for the actual situation. The simulated conditions were used to present a smart charging technique for electric vehicles that disperses electric vehicles being charged simultaneously. The EVs and Smart Charging Technique are modeled using the Electro Magnetic Transients Program (EMTP).

The Analysis of the Factors Influencing Telecommunication Service Providers Selection on Purchase of Smart Phones (스마트폰 구매 시 이동통신사 선정에 영향을 미치는 요인 분석)

  • Chang, Byeong-Yun
    • Journal of the Korea Society for Simulation
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    • v.22 no.2
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    • pp.85-91
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    • 2013
  • Smart phones become essential goods for our life. As the technology are developing, and the market becomes saturated, it is important to understand the determinants affecting purchase of smart phones. In this paper, to understand these determinants factor analysis and binary logistics regression is used. Toward this, we first define the determinants into 3 categories: customer satisfaction, switching barrier, and switching attractiveness based on literature review. Furthermore, we develop 9 hypotheses to test with survey data using factor analysis and binary logistics regression. The results show that the six factors (data quality, price satisfaction, corporate image, the burden of new contract, attraction of devices and attraction of other competitors) are significant when customers buy smart phones.

Clustering of Smart Meter Big Data Based on KNIME Analytic Platform (KNIME 분석 플랫폼 기반 스마트 미터 빅 데이터 클러스터링)

  • Kim, Yong-Gil;Moon, Kyung-Il
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.20 no.2
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    • pp.13-20
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    • 2020
  • One of the major issues surrounding big data is the availability of massive time-based or telemetry data. Now, the appearance of low cost capture and storage devices has become possible to get very detailed time data to be used for further analysis. Thus, we can use these time data to get more knowledge about the underlying system or to predict future events with higher accuracy. In particular, it is very important to define custom tailored contract offers for many households and businesses having smart meter records and predict the future electricity usage to protect the electricity companies from power shortage or power surplus. It is required to identify a few groups with common electricity behavior to make it worth the creation of customized contract offers. This study suggests big data transformation as a side effect and clustering technique to understand the electricity usage pattern by using the open data related to smart meter and KNIME which is an open source platform for data analytics, providing a user-friendly graphical workbench for the entire analysis process. While the big data components are not open source, they are also available for a trial if required. After importing, cleaning and transforming the smart meter big data, it is possible to interpret each meter data in terms of electricity usage behavior through a dynamic time warping method.

Proposal of Service Description Data format and Ontology of Media Thing for Smart Contract in MPEG-IoMT (MPEG-IoMT 내 스마트 계약을 위한 미디어 사물의 Service Description 데이터 포맷 및 온톨로지 제안)

  • Kim, Shin;Yoon, Kyoungro
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • pp.35-37
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    • 2019
  • MPEG-IoMT(Internet of Media Thing) 국제 표준은 미디어 사물 인터넷 간 프로세싱된 데이터를 주고 받기 위한 표준이다. 미디어 사물 간 주고 받기 위한 표준화된 데이터 표준은 제정되었으나, 미디어 사물에 연결하기 위한 미디어 사물의 서비스 조건에 대한 서술 표준은 존재하지 않는다. 본 논문에서는 미디어 사물을 연결하기 이전에 서비스 정보를 제공하기 위한 Service Description 온톨로지를 제안하며 제안된 온톨로지를 통해 미디어 사물의 자동화된 스마트 계약이 수월해질 것으로 예상된다.

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