• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권11호
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• pp.5673-5691
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• 2019

Information centric mobile network can significantly improve the data retrieving efficiency by caching contents at mobile edge. However, the cache pollution attack can affect the data obtaining process severely by requiring unpopular contents deliberately. To tackle the problem, we design an algorithm of mitigating cache pollution attacks in information centric mobile network. Particularly, the content popularity distribution statistic is proposed to detect abnormal behavior. Then a probabilistic caching strategy based on abnormal behavior is applied to dynamically maintain the steady-state distribution for content visiting probability and achieve the purpose of defense. The experimental results show that the proposed scheme can achieve higher request hit ratio and smaller latency for false locality content pollution attack than the CacheShield approach and the baseline approach where no mitigation approach is applied.

• 한국컴퓨터정보학회논문지
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• 제5권3호
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• pp.40-45
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• 2000

최근에 WWW의 등장과 함께 인터넷 사용자가 폭발적으로 증가하고 웹 지리정보시스템의 필요성과 중요성이 크게 대두되어 인터넷을 통한 공간데이타 유통 환경을 구축하기 위하여 여러 기관 등에서 많은 기술개발 연구가 이루어지고 있다. 공간데이타를 인터넷상에서 접근하기 위해서는 WWW상에 공간데이타를 등록하고 필요로 하는 사람에게 판매할 수 있는 공간데이타 전자유통 시스템이 필요하다. 본 논문에서는 WWW과 연동하는 공간데이타 전자유통 시스템을 구축하기 위한 효율적인 공간데이타 전자유통시스템의 모델을 설계하고 제시한다. 또한 시스템의 각 모듈에 대한 기능과 구현 방법을 제안한다.

• 한국통신학회논문지
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• 제37B권10호
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• pp.901-911
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• 2012

한국의 인터넷은 매우 빠르게 진화해 등록된 AS 수는 755개에 이르지만 국내에서 AS 수준의 인터넷 위상을 분석한 연구는 거의 전무하다. 본 연구에서는 한국 인터넷 AS 위상 구축과 power-law 특성 분석을 시도 하였다. 보다 정확하고 최신의 AS 수준 위상 구축을 위해 사용 가능한 데이터들을 모두 조사 하였다. 이들에 대한 비판적인 분석 과정을 통해 한국의 실정에 적합하고 또한 획득 가능한 데이터 소스 들을 유도 하였다. UCLA의 "Internet Topology Collection"을 이용한 BGP 데이터 그리고 IRR 과 IXP 데이터로부터 실제 국내 인터넷에 최대한 근접한 위상 데이터를 추출하고 검증 절차를 거쳐 한국 인터넷의 AS 수준 위상을 구축 하였다. 전 세계 AS 수준 위상의 차수 분포가 power-law 분포를 따르는 것으로 알려져 있다. 본 연구에서는 전 세계 AS 수준 위상의 일부분인 한국 AS 수준 위상의 차수 분포가 power-law 분포를 따르는지 조사하였다.

• 한국정보과학회논문지:정보통신
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• 제27권1호
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• pp.48-57
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• 2000

보다 높은 대역폭에서 안전한 멀티캐스트 통신을 하고자 욕구는 기업, 정부, 그리고 인터넷을 사용하는 모든 단체에서의 고조되고 있는 주요 관심사이다. 멀티캐스트 환경에서 보안성을 제공하기 위해 최근까지 진행되어 오고 있는 연구는 주로 그룹 키 분배 기법에 관한 것들이다[1,3,4,5]. 본 논문에서는 현재까지 진행되어 오고 있는 여러 가지 그룹 키 분배 기법들에 대해 살펴보고, 보안성과 확장성을 제공해주는 새로운 인터넷 멀티캐스트 그룹 키 분배 기법을 제안한다. 또한 제안한 기법을 기반으로 현재 사용되는 멀티캐스트 응용 프로그램에 접목하여 실험 결과를 분석한다. 실험 결과를 통해 멀티캐스트 그룹 가입과 탈퇴에 대한 키의 분배, 재분배에 관련된 처리 시간이 최소화됨을 알 수 있다.

• 한국의류학회지
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• 제35권7호
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• pp.787-800
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• 2011

This study investigated service recovery justice perception, purchase satisfaction, positive word-of- mouth (WOM) intention, and repurchase intention of fashion consumers according to the types of internet shopping malls. A survey was conducted from December 20 in 2010 to January 28 in 2011, and 324 respondents who had complaint with internet shopping malls were used in the data analysis. The statistical analysis methods were frequency analysis, factor analysis, reliability analysis, t-test, ANOVA, and multiple regression analysis. The results of this study were as follows. First, in case of integrated internet shopping malls, the procedure justice influenced the purchase satisfaction and the interaction justice influenced the positive WOM intention. In addition, the distribution justice influenced the repurchase intention of fashion consumers. In the case of an open market, the interaction justice influenced the purchase satisfaction and the distribution justice influenced the positive WOM intention. In case of specialized internet shopping malls, the distribution justice influenced the purchase satisfaction and the interaction justice influenced the repurchase intention. Second, there was a difference in the procedure justice, positive WOM intention, and repurchase intention according to gender.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권8호
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• pp.3630-3656
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• 2018

Degree distribution can provide basic information for structural characteristics and internal relationship in social network. It is a critical procedure for social network topology analysis. In this paper, based on the mean-field theory, we study a special type of social network with exponential distribution of time intervals. First of all, in order to improve the accuracy of analysis, we propose a spreading coefficient algorithm based on intimate relationship, which determines the number of the joined members through the intimacy among members. Then, simulation show that the degree distribution of follows the power-law distribution and has small-world characteristics. Finally, we compare the performance of our algorithm with the existing algorithms, and find that our algorithm improves the accuracy of degree distribution as well as reducing the time complexity significantly, which can complete 29.04% higher precision and 40.94% lower implementation time.

• 유통과학연구
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• 제15권2호
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• pp.15-20
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• 2017

Purpose - This paper aims to suggest a delivery constrained internet shopping optimization problem (DISOP) which must be solved for online recommendation system to provide a customized service considering cost and delivery conditions at the same time. Research design, data, and methodology - To solve a (DISOP), we propose a multi-objective formulation and a solution approach. By using a commercial optimization software (LINDO), a (DISOP) can be solved iteratively and a pareto optimal set can be calculated for real-sized problem. Results - We propose a new research problem which is different with internet shopping optimization problem since our problem considers not only the purchasing cost but also delivery conditions at the same time. Furthermore, we suggest a multi-objective mathematical formulation for our research problem and provide a solution approach to get a pareto optimal set by using numerical example. Conclusions - This paper proposes a multi-objective optimization problem to solve internet shopping optimization problem with delivery constraint and a solution approach to get a pareto optimal set. The results of research will contribute to develop a customized comparison and recommendation system to help more easy and smart online shopping service.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2003년도 추계종합학술대회 논문집
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• pp.474-480
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• 2003

인터넷 유해 사이트중 청소년들에게 가장 해악이 심한 것이 음란 사이트이다. 본 고에서는 이같은 음란사이트에 대한 현황, 배포방법, 내용과 차단책 등 음란사이트 전체에 대한 심도있는 고찰을 행하고자 한다. 이를 통해 음란 사이트에 대한 문제점을 심도있게 분석 및 다룸으로써 건전한 인터넷 문화 형성에 기여하고자 한다.

• 유통과학연구
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• 제16권5호
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• pp.61-70
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• 2018

Purpose - These days, an individual user, private entity, hears everyday news of hacking and personal information leakage in the era of a most-connected society. This study investigates cyber attack, cyber insurance and distribution channels for insurance goods in South Korea by analyzing various cases of cyber attacks in domestic and overseas case. Research design, data and methodology - This study adopted various study cases instead of the one large case for deep quality analysis, and focused on various cases of domestic and overseas cyber attacks with insurance. Result - As a result of analyzing the cases that were hacked, types of massive losses and damages arising out of internet blackout due to cyber risks are paralyzation of public and private website and portal, electronic administrative system, public infrastructure, and consequently a normal operation of nation is impossible. These losses and damages however can be coverable under cyber insurance. Conclusions - This paper suggests insurance carriers, as suppliers, should provide multiple channels to sell to the customer and should expand the strategy of advertisement and promotion in order for them to change their mind and compare the price and value of the information of individual users and private entity in view of cost savings.

• 유통과학연구
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• 제18권5호
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• pp.15-23
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• 2020

Purpose: This research focused on the fact that the Internet platform is integral to IoT products such as Smart home and studied consumer buying decisions when products are sold bundled with internet service. Contrary to the sales strategies of telecommunication companies, some companies sell IoT products alone, for example Google, Kakao, and Naver. In this market situation, the sales strategies of Korean telecommunication companies were analyzed with bundling theory and technology acceptance model, then it was conducted to figure out which sales and distribution strategies could affect consumers' purchase behavior. Research design, data, methodology: Data was collected by149 questionnaires from groups who are familiar with IoT smart home systems, then exploratory factor analysis and regression were used to analyze the research model. Results: The results revealed that the perceived ease of use and the perceived usefulness affect the purchase intention of IoT-based products; however, this effect was not found in the case of bundled products. In other words, it is found that selling and distributing Internet services and IoT products together does not affect consumers' purchases. Conclusion: It is suggested that Korean telecommunications companies' existing sales and distribution strategies for IoT products need to be changed according to its characteristics.