• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.400-402
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• 2002

Recently, it is requested interoperability and inter-connection among technologies due to network externalities and the rapid innovation in the telecommunications industry. Firms are technically tied up with the others the survival in the keen competition age. The switching cost is caused when a consumer changes his existing service to new one in the telecommunications. The switching cost hinders consumers from making a choice of better services or goods, and obstruct the fair competition among firms. In this paper, we will examin the effects on the competition among companies of the switching cost, and suggest national policies to promote the competition in the telecommunication markets.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.2
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• pp.289-298
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• 2016

Though, thanks to NPKI(National Public Key Infrastructure), the Korean secure Internet transaction environment has been rapidly grown in the last decade, it also faces with several problems, which need to be solved in near future, mainly resulted from the lack of openness and compatability of the NPKI-based environment which is operating in a closed way. It is believed that those problems of the NPKI can be solved when it is implemented to be based on the SSL/TLS, an international standard for web-based secure Internet transactions. The transition to the SSL/TLS-based NPKI needs to be performed so that the advantages of current NPKI are well maintained. The purpose of this paper is to comparatively analyze the NPKI and the SSL/TLS so as to give basic idea of implementing the current NPKI to be based on the SSL/TLS. The analysis will show not only how the SSL/TLS-based NPKI can improve current NPKI but also how the advantages of current NPKI can be maintained by the SSL/TLS-based NPKI.

• Korean Journal of Construction Engineering and Management
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• v.7 no.4 s.32
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• pp.109-117
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• 2006

The domestic construction market is recovered after a foreign exchange crises but recently it's daunted again because of the sustainable real estate regulation policy by the government. The other aspect, after the WTO(World Trade Organization) system opened overseas construction is growing continuously with growth of international economy and opening of market through world. Moreover, for ballooning oil prices an orders increase by oil-producing countries, the Middle East, gives good chances to domestic construction enterprises. But, the domestic firms decrease on our domain by chases of developing country and high-technology or advanced country. This research will indicate processes of our construction business to analyze performance record about our overseas construction from the 1970s to present. Based on the results it intends to search for problems of our construction enterprises and provide useful analytic data for expansion of overseas construction market.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.213-218
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• 2007

Domestic by opening of world construction market with recent FTA should be achieved systematic action that of exoteric surrounding construction environment to inculcate this because consciousness structure unpreparedness of legation fields about quality is expose for hindrance factor for QI in construction spot by quality and organization management official important thing for building company's QI because conquest is possible through QI of construction to possess government official and international competitiveness of customer satisfaction by offering consumer building of change and good quality rapidly, organization's CEO determination must become side improvement the formation government official enemy, and when inspect by each process, responsible persons participate cooperation enterprise space-time. To improve this because complete charge department for quality control appears that organization management need complete charge department being expose by greatly unprepared misgovernment in heavy hydrogen building company, expense that CEO under direct control histiocyte modeling air with AHP analysis is economical will be cost, but is construed can bring excellent effect in operation management side of quality and organization such as cost-cutting effect in maintenance side and I should do so that can occupy competitive power high position with tissue at active quality complete charge deputy.

• The KIPS Transactions:PartD
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• v.8D no.6
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• pp.789-798
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• 2001

ITS (Intelligent Transport Systems) is comprised of a number of advanced technologies, including information processing, communications, control, and electronics. Joining these technologies to the transportation system will save lives more safely, save time, and save money more efficiently. The National ITS Architecture provides a common framework for planning, defining, and integrating intelligent transportation systems. Most ITS projects are being designed and implemented in accordance with the National ITS Architecture, a reference framework that spans all of standards activities. Recently, as software technology is rapidly improved and stabilized, there are some needs to reuse pre-developed and powerful ITS technology. ITS standardization based on components and open interfaces becomes a way to solve these reusability of current ITS technology. This paper focuses on how could we design and implement the ITS component based on the National ITS Architecture. Furthermore, design and analysis of UML (Unified Modeling Language) was made through the ATIS (Advanced Traveller Information System) component development task and this UML methodology is expected to provide a standardized model for newly developed ITS components.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.3
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• pp.1439-1444
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• 2013

Recently, as the use of the applications like online banking and stock trading is increasing by the rapid development of the network, security of data content is becoming more and more important. Accordingly, public key or symmetric key encryption algorithm is widely used in open networks such as the internet for the protection of data. Generally, public key cryptographic systems is based on two famous number theoretic problems namely factoring or discrete logarithm problem. So, public key cryptographic systems is relatively slow compared to symmetric key cryptography systems. Among public key cryptographic systems, the advantage of ECC compared to RSA is that it offers equal security for a far smaller key. For this reason, ECC is faster than RSA. In this paper, we propose a efficient key generation method for elliptic curve cryptography system based on the real number field.

• Journal of Navigation and Port Research
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• v.32 no.6
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• pp.473-479
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• 2008

Recently the trade patterns of the entire economy are rapidly changing on development of IT. The field of port logistics is enforcing a competitiveness through preliminary offer of information and a batch process for improving the structure of logistics management which is apparently high cost and the low efficiency since 1990. But a previous EDI is insufficient in process ability. Bemuse it costs for the purchasing and maintenance of the expensive communication devices which is operated on the VAN environment. A web based EDI operating on an open network environment is needed to improve these problems and to handle transaction efficiently among many and unauthorized personals. Therefore, this study is willing to present a new web based model of the pull process which extracts the data when the receiver is needed to improve the push process which is transmitting data unilaterally.

• Journal of Digital Convergence
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• v.19 no.9
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• pp.157-168
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• 2021

As a recent global economic trend, the subscription economy is rapidly expanding along with the growth of non-face-to-face online shopping. This study tried to verify the factors influencing online subscription for disposable consumer goods through behavioral reasoning theory. 344 questionnaire responses were collected through a survey in Korea and empirical analysis was performed. As a result of the analysis, value of openness was found to have a positive effect on attitude, reason for adoption and reason against adoption. Reason for adoption showed a positive effect on attitude and adoption intention. Reason against adoption showed a negative effect on attitude but it has no impact on adoption intention. Attitude showed a positive effect on adoption intention. Finally price consciousness and quality barrier was found to the most important factors of reason for adoption and reason against adoption respectively. The results of this study can contribute to subscription companies establishing their marketing strategies. Future research can be conducted with various subscription products and additional variables.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.22 no.2
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• pp.267-281
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• 2012

SCADA system is a computer system that monitors and controls the national infrastructure or industrial process including transportation facilities, water treatment and distribution, electrical power transmission and distribution, and gas pipelines. The SCADA system has been operated in a closed network, but it changes to open network as information and communication technology is developed rapidly. As the way of connecting with outside user extends, the possibility of exploitation of vulnerability of SCADA system gets high. The methodology to protect the possible huge damage caused by malicious user should be developed. In this paper, we proposed anomaly detection based intrusion detection methodology by estimating self-similarity of SCADA system.

• Journal of the Korean BIBLIA Society for library and Information Science
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• v.19 no.1
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• pp.5-17
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• 2008

Rapid expansion of digital convergence, involving services and technologies from different areas that are combining to create new forms of products or services. Digital convergence itself is changing from technology-based to content-based, to include the convergence of different types of contents as well as contents of the same kind. In line with this trend, vigorous researches are being done to combine various formats and types of academic contents to create new services. In this paper, we examine cases of connection and convergence among different types of academic contents and analyze its characteristics, as well as the pros and cons. We especially focus on CLICK, KISTI's model of connection and convergence among different types of contents, to introduce a special feature of convergence platforms, difficulties involved and their solutions, and researches to be conducted in the future.