• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.10
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• pp.4385-4393
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• 2011

Doctor-shopping which has a tendency to seek out alternative opinions when they got diagnosed by a doctor is increasing nowadays. The purpose of this study is to examine the relationship between the doctor-shopping behavior of Korean and the related variables. Questionnaires have been distributed from 2009/10/16 to 2009/11/16 and the sample size of this study is 223 people in Korea who experienced of medical service for disease treatment purpose. Among the six independent variables, confidence in doctor's ability variable and trust of the Internet information variable have correlation with the doctor-shopping behavior. With the development of Internet and raise of consciousness toward consumer right, the consumers are now selecting doctors slightly as if they go shopping.

• 한국정보통신설비학회:학술대회논문집
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• 2004.08a
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• pp.147-150
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• 2004

인터넷 정보의 디지털화가 사회 각 분야에 빠르게 진행되고 있다. 인터넷 기술을 기반으로한 정보사회가 도래함에 따라 멀티미디어 정보를 생성 가공해 저장 분배하는 서비스가 광범위하게 생활화되고 있다. 방대한 데이터를 가공하고 저장하는데 있어 효율적이고 경제적으로 처리할 수 있는 혁신적인 정보서비스 솔루션이 필요한 시점이다. IP 기반 클러스터 스토리지는 방송, 통신, 컴퓨터, 가전 등을 포함한 다양한 미디어 및 디지털 데이터를 융합하는 디지털 컨버젼스 플랫폼 환경에서 양방향 디지털 이이템 거래를 최적화 시키는데 필요한 고성능/고가용성/고신뢰성을 갖는 스토리지 플랫폼이다. 본 논문은 IP 기반 클러스터 스토리지 관리를 위한 클러스터 스토리지 관리 소프트웨어 개발에 관한 연구이다. 클러스터 스토리지 관리 소프트웨어는 SNMP나 EWS와 달리 XML을 기반으로 효율적인 구성 관리 및 정보 표현 등 XML의 장점을 최대한으로 이용하여 설계하였으며 XML 및 XML-RPC를 통하여 분산된 스토리지 시스템의 효율적인 관리 방법 및 개발 방안에 대해 기술한다.

• Annual Conference of KIPS
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• 2008.05a
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• pp.946-949
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• 2008

네트워크를 사용하는 응용프로그램의 종류가 다양해지면서 네트워크 트래픽의 응용별 분류는 효율적인 네트워크 관리에 있어 그 중요성이 커지고 있지만, 오늘날 응용프로그램의 특징인 유동적인 포트번호 사용 및 패킷의 암호화 등은 트래픽의 응용별 분류를 더욱 어렵게 하고 있다. Well-known 포트기반의 응용별 분류방법의 단점을 극복하기 위하여 머신러닝 알고리즘과 Signature 기반 분석 방법들이 연구되고는 있지만 주장하는 높은 분석률에 비하여 실제 네트워크 트래픽에 적용하기에는 신뢰성이 부족하다. 본 논문에서는 일부 종단 호스트에 설치된 TMA(Traffic Measurement Agent)로 부터 수집한 응용프로그램의 트래픽 사용 정보를 기초로 하여 전체 네트워크 트래픽의 응용프로그램을 판별하는 응용 트래픽 분류 방법론을 제안한다. 제안된 방법론은 트래픽 플로우들의 상관관계를 이용하여 TMA 호스트 트래픽으로부터 TMA가 설치되지 않은 호스트에서 발생한 트래픽들의 응용을 판단하며, 분류 된 결과에 대하여 높은 신뢰성을 보장한다. 제안된 방법론은 학내 네트워크에 적용하여 그 타당성을 검증하였다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.5
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• pp.33-38
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• 2019

In this paper, we propose a new blockchain technology that could comply with GDPR. The proposed model can prevent illegal access by controlling access to the personal information according to a access policy. For example, it can control access to the information on a role-basis and information validation period. The core mechanism of the proposed model is to encrypt the personal information with public key which is associated with users attributes policy, and then decrypt it with a private key and users attributes based on a Attribute-based Encryption scheme. It can reduce a trusted third-part risk by replacing it with a number of nodes selected from the blockchain. And also the private key is generated in the form of one-time token to improve key management efficiency. We proved the feasibility by simulating the proposed model using the chaincode of the Hyperledger Fabric and evaluate the security.

• The KIPS Transactions:PartD
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• v.11D no.2
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• pp.485-494
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• 2004

Recently, the wireless internet terminals like mobile phones or PDAs prevail in the management of customers. With such terminals, businessmen can get business data and information of customers in real time, in connection with mobile group wares. By the wireless terminals, customers can conveniently get information of goods, search purchase sites, and give orders and do settlement. This paper aims to present the safe data integrity modules of the wireless internet terminal, for service providing correct real-time promotion information, by using users' disposition, situation, Purchase information. This study aims to suggest an implementation methodology of security module for data integrity of mobile internet terminal. This is based on the WTLS of WAP Protocol. This security module is expected to achieve central role in conversion of wireless internet environment and emphasis of encryption technology and safe and calculable wireless communication environment construction

• Journal of Distribution Research
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• v.13 no.1
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• pp.1-33
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• 2008

As the interest in the business-to-business(B2B) electronic commerce is increasing, many companies are participating in the B2B e-Marketplaces. The e-Marketplace is defined as the virtual market that many players take part in to transact. The e-Marketplace has an influenced on the manner in which organizational buyers and sellers interact. As a result, it is important to develop an understanding of the behaviors of firms that use these electronic marketplaces. The purpose of this study is to develop a comprehensive model for trust and commitment of B2B e-Marketplace and empirically to examine their structural relationships. Drawing from trust and commitment theory in the interorganizational relationship and B2B electronic commerce context, this study identifies network externality, interactivity, justice, quality of information sharing, institutional assurance as the determinants of trust and commitment of e-Marketplace. The proposed model hypothesized that (1) trust is a function of network externality, interactivity, justice, quality of information sharing, institutional assurance, (2) attitudinal and behavioral commitment is a function of trust, (3) behavioral commitment is a function of attitudinal commitment. The proposed model is tested using organizational-level survey data from 187 buying organizations that conduct business in MRO e-Marketplaces. The data were tested by reliability test, correlation analysis, exploratory factor analysis, confirmatory factor analysis and covariance structure analysis. The results indicate that (1) trust is influenced by network externality, interactivity, justice, institutional assurance, (2) attitudinal commitment and behavioral commitment is influenced by trust (3) behavioral commitment is influenced by attitudinal commitment. Also, the empirical results confirmed that trust play a strong, central role in determinging e-Marketplace commitment. The key theoretical contribution of this research is that it begins to extend interorganizational information system literature in areas such as B2B Internet e-Marketplace. Managerially, this study contributes tn the understanding of the role of B2B e-Markeplace providers in Internet situation. And Limitations of this study and guidelines for future researches are also discussed.

• The KIPS Transactions:PartC
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• v.18C no.2
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• pp.103-110
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• 2011

Although a mobile Internet telephony service becomes popular with the rapid propagation of smart phones, its service quality management system has not been prepared enough yet. For successful settlement and deployment of the mobile Internet telephony service in future, a strict service quality management is required. The service quality management using a specific measurement equipment has limitations that real-time monitoring is impossible. In this paper, therefore, we propose a proactive service quality management system for the mobile Internet telephony service and develop a software for its implementation. The developed software is verified by comparing the measurement results from the developed software to those from the softwares commonly used, and it is proved that the developed software is quite reliable.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.05a
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• pp.485-487
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• 2017

With the growth of the IoT, security is a growing concern. Things the risk of IoT security has been constantly raised, and there have been many cases of hacking. As a result, there is a growing concern and scale about security, but there is a lack of interest and research on the message protocols between Iot devices. With the development of the IoT, the importance of low-power, lightweight and accurate message delivery will become more important and more advanced message protocols will be needed. In this paper, it is aimed to construct the system for communication between client and server of MQTT and CoAP with Confirmative option, which are most used among IoT message protocols and compare the message reliability of each communication protocol to check efficiency.

• Journal of Korean Library and Information Science Society
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• v.37 no.3
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• pp.59-73
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• 2006

The purpose of this paper was to empirically examine college students' on-line bookstore utilization status. The focus of this study was placed on three major issues. First. what are the college students' motivations in using on -line' bookstore. Second. what are the major determinants of college students' on -line bookstore utilization. Third. how book genres are related to students' on -line bookstore utilization behavior. Data were collected from 215 college students during October 10, 2005 to October 17, 2005. The analyses showed following results: First, the college students' on -line bookstore utilization motivations were grouped into three areas-convenience motivation, interaction motivation, and information collecting motivation. Second. college students who were oriented toward convenience motivation, who were more interested in on-line bookstores, and who were more satisfied with on-line services, made more frequent visits to on-line bookstore sites. Third, college students who allocated less time to book readings showed a tendency of buying books through on-line bookstores. Finally, college students who were more interested in on -line bookstores showed more satisfaction and bought such various books as literature, hobby or practical books, foreign novels, and general readings. This finding suggests that in order to activate on-line bookstore business. book industries, especially the publishers and/or distributors, have to develop new ideas which can make an appeal to college students who are believed to be critical book readers.

• The Journal of the Korea Contents Association
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• v.16 no.7
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• pp.154-167
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• 2016

This study is to analyze whether the use of SNS in politics has any political effects. Most previous studies on political participation by SNS tended to just focus on the participation difference between SNS users and non-users. The test results first show that the development of ICT increases citizens' interest in political information and differentiate the methods of their political participation. Second, we identified SNS users tend to have higher reliability in political information and greater transversion effects by the use of media. Finally, the study verifies SNS is a more effective tool in collective actions such as non-customary rallies and demonstration rather than in customary political participation.