• Title, Summary, Keyword: Block Chain

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Design of Personal Career Records Management and Duistribution using Block Chain (블록체인을 활용한 개인 경력 관리 및 유통 시스템 설계)

  • Bae, Su-Hwan;Shin, Yong-Tae
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.13 no.3
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    • pp.235-242
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    • 2020
  • This paper proposes a system that can manage and verify personal career information through a block chain to solve the problem of getting a job by forging an individual's career when hiring employees. Blockchain network uses private network, and inside the block, the user's academic and career information is kept. The functions of the block chain perform the functions of block creation, block internal data retrieval, career and academic verification, which works through chain code. As a result of the performance evaluation of the proposed system, the processing time per transaction was measured at approximately 110 ms and the search time was measured at 10 ms, and it was applied to the actual system to confirm that it was available.

Decision making model for introducing Medical information system based on Block chain Technologies (블록체인 기반 의료정보시스템 도입을 위한 의사결정모델)

  • Zheng, Yajun;Kim, Keun Hyung
    • The Journal of Information Systems
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    • v.29 no.1
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    • pp.93-111
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    • 2020
  • Purpose The purpose of this paper is to observe the relative priorities of importances among the modified versions of Block chain system, being based on AHP decision support model which should be also proposed in this paper. Design/methodology/approach Four versions modified from the beginning of Block chain were divided into Public& Permissionless, Private&Permissionless, Public&Permissioned and Private&Permissioned types. Five criteria for evaluating the four versions whether the version were suitable for Medical information system were introduced from five factors of Technologies Accept Model, which were Security, Availability, Variety, Reliability and Economical efficiency. We designed Decision support model based on AHP which would select the best alternative version suitable for introducing the Block chain technology into the medical information systems. We established the objective of the AHP model into finding the best choice among the four modified versions. First low layer of the model contains the five factors which consisted of Security, Availability, Variety, Reliability and Economical efficiency. Second low layer of the model contains the four modified versions which consisted Public&Permissionless, Private&Permissionless, Public&Permissioned and Private& Permissioned types. The structural questionnaire based on the AHP decision support model was designed and used to survey experts of medical areas. The collected data by the question investigation was analyzed by AHP analysis technique. Findings The importance priority of Security was highest among five factors of Technologies Accept Mode in the first layer. The importance priority of Private&Permissioned type was highest among four modified versions of Block chain technologies in second low layer. The second importance priority was Private&Permissionless type. The strong point of Private&Permissioned type is to be able to protect personal information and have faster processing speeds. The advantage of Private& Permissionless type is to be also able to protect personal information as well as from forging and altering transaction data. We recognized that it should be necessary to develop new Block chain technologies that would enable to have faster processing speeds as well as from forging and altering transaction data.

Synthesis and Non-isothermal Crystallization Behavior of Poly(glycolide-co-${\varepsilon}$-caprolactone) Block Copolymer (Poly(glycolide-co-${\varepsilon}$-caprolactone) 블록 공중합체의 합성과 비등온 결정화 거동 분석)

  • Choi, Song-Yeon;Jee, Min-Ho;Park, Nam-Jib;Song, Seung-Ho;Choi, Kyo-Chang;Baik, Doo-Hyun
    • Textile Science and Engineering
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    • v.48 no.1
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    • pp.51-59
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    • 2011
  • Poly(glycolide-co-${\varepsilon}$-caprolactone)(PGCL) block copolymers were synthesized by two step polymerization using glycolide and ${\varepsilon}$-caprolactone as starting materials. The chain-microstructures of the resulting block copolymers were characterized by $^1H-NMR$. The structure and thermal properties of the PGCL block copolymer were strongly affected by the chain-microstructure of the prepolymer. The non-isothermal crystallization behavior of the PGCL block copolymers was examined at various cooling rates and analyzed with modified-Avrami and Ziabicki equations. The PGCL block copolymer with a lower degree of randomness in the prepolymer block had a higher crystallization temperature and faster crystallization rate, which suggests that differences in chain-microstructure of the PGCL prepolymer can affect the crystallization characteristics, such as crystallinity and crystallization rate.

The Effects of BlockChain Technology Benefits on Acceptance Intentions of BlockChain Insurance Services : Based on the UTAUT Mode (블록체인 기술 혜택의 효과가 블록체인 보험 서비스의 수용의도에 미치는 영향 : UTAUT 모형을 기반으로)

  • Kim, Jong Pil;Song, Eugene
    • Journal of Information Technology Services
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    • v.17 no.4
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    • pp.163-189
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    • 2018
  • In this study, we analyze the acceptance theories of insurance services using blockchain technology. Although insurance services using block-chain technology are still in discussion, specific development methods for service methods applying block-chain technology in insurance services are being studied. In this study, the following analysis was conducted to analyze the acceptance of insurance services using block chain technology, focusing on four factors of the UTAUT model. As a result of the analysis, the technology benefits of the blockchain affecting the performance expectations of UTAUT are security and reliability. In addition, the factors influencing UTAUT's effort expectations were found to be availability and economics. Therefore, it was found that performance expectation and effort expectation for technology acceptance are influenced by different technology benefits. Among the four factors of UTAUT, the factors affecting the insurance service using the blockchain technology are performance expectation and effort expectation, and social influence and promotion condition have no effect on acceptance intention. Also, the moderating effect of user innovation on acceptance intention of insurance service applying blockchain was significant only for effort expectation among UTAUT factors.

Counter Chain: A New Block Cipher Mode of Operation

  • El-Semary, Aly Mohamed;Azim, Mohamed Mostafa A.
    • Journal of Information Processing Systems
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    • v.11 no.2
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    • pp.266-279
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    • 2015
  • In this paper, we propose a novel block cipher mode of operation, which is known as the counter chain (CC) mode. The proposed CC mode integrates the cipher block chaining (CBC) block cipher mode of operation with the counter (CTR) mode in a consistent fashion. In the CC mode, the confidentiality and authenticity of data are assured by the CBC mode, while speed is achieved through the CTR mode. The proposed mode of operation overcomes the parallelization deficiency of the CBC mode and the chaining dependency of the counter mode. Experimental results indicate that the proposed CC mode achieves the encryption speed of the CTR mode, which is exceptionally faster than the encryption speed of the CBC mode. Moreover, our proposed CC mode provides better security over the CBC mode. In summary, the proposed CC block cipher mode of operation takes the advantages of both the Counter mode and the CBC mode, while avoiding their shortcomings.

Volunteering system using block chain and reverse auction (블록체인을 활용한 역경매 봉사활동 관리시스템 설계)

  • Kim, Sea Woo
    • The Journal of the Convergence on Culture Technology
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    • v.5 no.1
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    • pp.435-441
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    • 2019
  • While block chain technique usage is wide spread over many areas, volunteering system is another subject in use. In this paper, we propose reverse auction and block chain technique in volunteering matching system. Detailed process on each step of system are suggested. Pros and cons of our new system are also discussed.

Necessity of Safety Management System applying Big Data and Block Chain Technology (블록체인 기술과 빅데이터 기술을 적용한 안전 관리 시스템의 필요성)

  • Oh, Weon-Kyun;Kim, Ki-Hyuk;Lee, Donghoon
    • Proceedings of the Korean Institute of Building Construction Conference
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    • pp.197-198
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    • 2019
  • In this study, the study was conducted to derive the utility of the safety management system applying block chain technology and big data technology to improve the problems of construction sites where concealment and operation of safety accidents occur. If block chain technology and big data technology are applied to construction safety management, transparent data can be collected, and based on the collected data, it is possible to predict accidents that can occur at the construction site and establish countermeasures. It can also be an opportunity to strengthen the safety awareness of construction workers and managers, and can clearly identify the responsibility in the event of a safety accident. This study suggests that the application of the 4th Industrial Revolution technology could be a great opportunity to innovate the construction industry which is less than other industries.

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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.

Design of an Integrated University Information Service Model Based on Block Chain (블록체인 기반의 대학 통합 정보서비스 실증 모델 설계)

  • Moon, Sang Guk;Kim, Min Sun;Kim, Hyun Joo
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.20 no.2
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    • pp.43-50
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    • 2019
  • Block-chain enjoys technical advantages such as "robust security," owing to the structural characteristic that forgery is impossible, decentralization through sharing the ledger between participants, and the hyper-connectivity connecting Internet of Things, robots, and Artificial Intelligence. As a result, public organizations have highly positive attitudes toward the adoption of technology using block-chain, and the design of university information services is no exception. Universities are also considering the application of block-chain technology to foundations that implement various information services within a university. Through case studies of block-chain applications across various industries, this study designs an empirical model of an integrated information service platform that integrates information systems in a university. A basic road map of university information services is constructed based on block-chain technology, from planning to the actual service design stage. Furthermore, an actual empirical model of an integrated information service in a university is designed based on block-chain by applying this framework.