• The Journal of the Korea Contents Association
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• v.15 no.10
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• pp.535-546
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• 2015

Using mobile bookstore application is increasing in accordance with the proliferation of internet and mobile devices. In this circumstances, the purpose of this study is to explore the factors regarding to mobile bookstore application quality evaluation are effecting to customer satisfaction and reuse intention. Thus information, transaction, design, communication, ubiquitous access, personalization, safety are set as a quality evaluation factor. And it is analyzed the effect of these factors to customer satisfaction and reuse intention with path analysis method. As the result, transaction, ubiquitous access, personalization, safety factors effected customer satisfaction and customer satisfaction effected reuse intention. These results show that user mainly access mobile bookstore application for purchasing book. Thus it is important for mobile bookstore operator to keep the application accessed anytime, and serve personalized information, and simplify transaction process, and intensify security for protecting personal or transaction information.

• Environmental and Resource Economics Review
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• v.17 no.2
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• pp.327-347
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• 2008

This study proposes a new answering mechanism of deciding whether to purchase or not under uncertainty-real risk answering mechanism (R-RAM) for real transaction and hypothetical risk answering mechanism (H-RAM). It IS also. shown that the traditional answering mechanism (TAM) assumed in most of existing contingent valuation methods should be applied in a real transaction without uncertainty. While the willingness to pay (WTP) being simply compared with the bidding price m TAM, the mean of WTP should be greater than the bidding pnce at least by the risk premium for a purchase decision m R-RAM and H-RAM. Only difference between R-RAM and H-RAM is risk premium. The H-RAM takes a smaller risk premium than the R-RAM. This study proposes the contingent valuation method (CVM) with H-RAM could be an alternative to reducing the under-or over-estimation of WTP by comparing the WTP estimates obtained from three different CVMs with TAM, R-RAM and H-RAM.

• The Journal of the Korea institute of electronic communication sciences
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• v.8 no.3
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• pp.479-486
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• 2013

This study aims to survey the influence of the internet-based real estate transaction systems used by the common people on their decision-making for buying the real estate. That is, the purpose of this study is to review how the system for selection of the real estate has influence on the decision-making for buying the real estate, by exerting influence on the customer-satisfaction. Also, I want to present a scheme for the more effective internet-based real estate transaction system so that the real estate agents may grasp the on-line real estate transaction system and understand the intention of the customers for buying, and thereby establish the active marketing strategy.

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2000.11a
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• pp.28-32
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• 2000

인터넷의 대중화와 더불어 전자상거래에 대한 관심과 중요성이 더욱 증대되고 있다. 전자상거래에서 보다 많은 고객들을 유치하기 위해서는 거래의 안정성 보장, 시스템의 사용 편의성, 다양한 물품의 제공, 저렴한 가격 등과 함께 차별화된 고객 서비스 전략이 필요하다. 고객의 취향에 적합한 상품 정보를 제공함으로써 고객의 만족도를 증진시키고 나아가 지속적인 방문을 유도하고자 한다. 본 논문에서는 고객이 전자상거래 쇼핑몰을 방문시 고객별로 관리되는 선호도를 활용하여 고객의 취향에 적합한 상품 정보를 제공한다. 퍼지논리를 이용하여 제품군간에 근접도를 반영함으로서 사용자에게 보다 좋은 상품 정보를 제공하는 기법을 제안한다.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2004.06a
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• pp.29-34
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• 2004

본 연구에서는 Mobile Commerce(M-커머스) 사이트의 신뢰도에 영향을 미치는 요인들을 거래안전성, 기업이미지, 검색기능성 그리고 결제편의성으로 분류하여 관련 연구들을 통해 검증된 요인들을 추출하였다. 그리고 M-커머스 사이트의 현재 또는 잠재 고객들을 대상으로 직접 설문조사를 통해 M-커머스 사이트의 신뢰도에 영향을 미치는 요인을 식별해냄으로써 고객과의 신뢰형성을 위해 최우선적으로 고려해야 할 방향을 제시하고 M-커머스의 활성화에 기여하고자 한다.

• Journal of the Korean Institute of Intelligent Systems
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• v.11 no.1
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• pp.52-57
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• 2001

인터넷의 대중화와 더불어 전자상거래에 대한 관심과 중요성이 더욱 증대되고 있다. 전자상거래에서 보다 많은 고객들을 유치하기 위해서는 거래의 안정성 보장, 시스템의 사용 편의성, 다양한 물품의 제공, 저렴한 가격 등과 함께 차별화된 고객 서비스 전략이 필요하다. 고객의 취향에 적합한 상품 정보를 제공함으로써 고객의 만족도를 증진시키고 나아가 지속적인 방문을 유도하고자 한다. 본 논문에서는 고객이 전자상거래 쇼핑몰을 방문 시 고객별로 관리되는 선호도를 활용하여 고객의 취향에 적합한 상품 정보를 제공한다. 퍼지논리를 이용하여 제품군간에 근접도를 반영함으로써 사용자에게 보다 좋은 상품 정보를 제공하는 기법을 제안한다.

• The Journal of Society for e-Business Studies
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• v.24 no.2
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• pp.217-228
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• 2019

In the 4th Industrial Revolution, the Internet of Things emerged and various services and convenience improved. As the frequency of use increases, security threats such as leakage of personal information coexist and the importance of security are increasing. In this paper, we analyze the security threats of the Internet of things and propose a model for enhancing security through user authentication using Fast IDentity Online (FIDO). As a result, we propose to implement strong user authentication by introducing second authentication through FIDO.

• The Korean Journal of Applied Statistics
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• v.25 no.1
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• pp.15-27
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• 2012

We have studied the realized variance(RV) of intra-day returns and market microstructure noise based on high-frequency stock transaction data for the four largest companies in terms of market capitalization in the KOSPI. First, non-negligible biases are observed for the RV and for the bias-corrected realized variance($RV_{AC_1}$) which is constructed by adjusting RV for the first order autocorrelation in intra-day returns. Bias is more obvious for the RV and the $RV_{AC_1}$ when intra-day returns are sampled more frequently than every 2 minutes. Transaction Time Sampling(TTS) is shown to be better than Calendar Time Sampling(CTS) in terms of biases of the RV and the $RV_{AC_1}$ for the 4 companies. The analysis reveals that market microstructure noise is temporally dependent. Second, by using the Noise-to-Signal Ratio(NSR), we estimate sampling frequencies that are optimal in terms of the Mean Square Errors(MSE) of the RV and the $RV_{AC_1}$. The optimal sampling frequencies are around 200 for RV and is around 5000 for the $RV_{AC_1}$ for all the four stock prices. For the 6 hour transaction period of the Korean stock trading, these correspond to about 2 minutes and 6 seconds.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.1
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• pp.19-32
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• 2013

As cyber stock trading grows rapidly, stock trading using Home Trading System have been brisk recently. Home Trading System is a heavy-weight in the stock market, and the system has shown 75% and 40% market shares for KOSPI and KOSDAQ, respectively. However, since Home Trading System focuses on the convenience and the availability, it has some security problems. In this paper, we found that the authentication information in memory remains during the stock trading and we proposed its countermeasure through two-channel authentication using a mobile device such as a cell phone.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.5
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• pp.1175-1186
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• 2015

Financial fraud has been increasing along with credit card usage. Magnetic stripe cards have vulnerabilities in that credit card information is exposed in plaintext and cardholder verification is untrustworthy. So they have been replaced by a smart card scheme to provide enhanced security. Furthermore, the FinTech that combines the IT with Financial product is being prevalent. For that reason, many mobile device based payment schemes have been proposed for card present transaction. In this paper, we propose a virtual credit card number payment scheme based on public key system for efficient authentication in card present transaction. Our proposed scheme is able to authenticate efficiently in card present transaction by pre-registering virtual credit card number based on cardholder's public key without PKI. And we compare and analyze our proposed scheme with EMV.