• Journal of information and communication convergence engineering
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• 제6권1호
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• pp.68-72
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• 2008

The VoIP(Voice over IP) has been worldwide used and already put to practical use in many fields. However, it is needed to ensure secret of VoIP call in a special situation. It is relatively difficult to eaves-drop the commonly used PSTN in that it is connected with 1:1 circuit. However, it is difficult to ensure the secret of call on Internet because many users can connect to the Internet at the same time. Therefore, this paper suggests a new model of Internet telephone for eavesdrop prevention enabling VoIP(using SIP protocol) to use the VPN protocol and establish the probability of practical use comparing it with Internet telephone.

• 한국컴퓨터정보학회논문지
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• 제14권2호
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• pp.221-229
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• 2009

인터넷과 정보통신 기술이 발전함에 따라 영화 유통의 창구도 다양화 되고 있으며, 인터넷 VOD 극장은 저렴한 가격과 인터넷이라는 시간과 공간의 제약성이 없는 특징을 통해 새로운 영화 창구로서 자리 매김 하고 있다. 본 연구에서는 인터넷 VOD 극장을 이용하는 데 있어서 기존 연구에서 나타난 기술수용이론의 지각된 유용성과 몰입이론의 변수 그리고 인터넷 VOD 극장에서 제공하는 영화에 대해 소비자가 느끼는 흘드백 기간에 대한 민감도와 인터넷 VOD 극장에서 제공되는 영화 장르 선택의 다양성이 소비자의 이용 의도에 미치는 영향에 대해 살펴보았다. 본 연구의 의의는 기존 오프라인 영화관 및 다른 영화매체와의 경쟁 속에서 새로운 유통 창구로 자리매김하고 있는 인터넷 VOD 극장의 매체적인 특성을 찾고, 인터넷 VOD 극장 이용자의 이용 의도에 영향을 미치는 요인을 분석함으로써 향후 인터넷 VOD 극장 수익 발전 방향을 모색했다는 점에서 실용적인 의미가 있을 것이다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권10호
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• pp.2708-2730
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• 2012

The growing concern for the protection of personal information has made it critical to implement effective technologies for privacy and data management. By observing the limitations of existing approaches, we found that there is an urgent need for a flexible, privacy-aware system that is able to meet the privacy preservation needs at both the role levels and the personal levels. We proposed a conceptual system that considered these two requirements: a graph-based, access control model to safeguard patient privacy. We present a case study of the healthcare field in this paper. While our model was tested in the field of healthcare, it is generic and can be adapted to use in other fields. The proof-of-concept demos were also provided with the aim of valuating the efficacy of our system. In the end, based on the hospital scenarios, we present the experimental results to demonstrate the performance of our system, and we also compared those results to existing privacy-aware systems. As a result, we ensured a high quality of medical care service by preserving patient privacy.

• 사물인터넷융복합논문지
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• 제7권1호
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• pp.55-62
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• 2021

인터넷이 확산되고 다양한 스마트 기기가 등장하면서 세상은 빠르게 변화하고 있다. 고성능 PC와 초고속 통신망이 모든 가정에 빠르게 확산되고 있으며 여러 다양한 종류의 인터넷 사이트가 등장하고 있다. 특히 한국 부모들의 고학력 열광이 여기에 더해져 10대 인터넷 이용자 비율이 날마다 폭발적으로 증가하고 있다. 청소년의 경우 대부분이 온라인 게임에 인터넷을 사용하여 온라인 게임이 인터넷 중독의 주요 원인임을 나타내고 있다. 본 연구는 인터넷을 이용하는 남녀 고등학생을 대상으로 설문지를 이용하여 실시하였으며, 인구 통계학적, 사회학적 특성은 기초 자료로만 사용하였다. 본 연구에서는 학부모, 학생, 교사가 생각하는 바와 같이 인문계 고등학생의 학업 성취도에 따른 인터넷 중독 유형 분석 결과를 이용하여 인터넷 사용이 학업 성취에 영향을 미치는지 여부를 판단한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권3호
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• pp.1015-1029
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• 2021

Modern technology offers many ways to enhance teaching and learning that in turn promote the development of tools for educational activities both inside and outside the classroom. Many educational programs using the augmented reality (AR) technology are being widely used to provide supplementary learning materials for students. This paper describes the potential and challenges of using GeoGebra AR in mathematical studies, whereby students can view 3D geometric objects for a better understanding of their structure, and verifies the feasibility of its use based on experimental results. The GeoGebra software can be used to draw geometric objects, and 3D geometric objects can be viewed using AR software or AR applications on mobile phones or computer tablets. These could provide some of the required materials for mathematical education at high schools or universities. The use of the GeoGebra application for education in Laos will be particularly discussed in this paper.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권4호
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• pp.2198-2222
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• 2019

The cloud storage service becomes a rising trend based on the cloud computing, which promotes the remote data integrity auditing a hot topic. Some research can audit the integrity and correctness of user data and solve the problem of user privacy leakage. However, these schemes cannot use fewer data blocks to achieve better auditing results. In this paper, we figure out that the random sampling used in most auditing schemes is not well apply to the problem of cloud service provider (CSP) deleting the data that users rarely use, and we adopt the probability proportionate to size sampling (PPS) to handle such situation. A new scheme named improving audit efficiency of remote data for cloud storage is designed. The proposed scheme supports the public auditing with fewer data blocks and constrains the server's malicious behavior to extend the auditing cycle. Compared with the relevant schemes, the experimental results show that the proposed scheme is more effective.

• International Journal of Internet, Broadcasting and Communication
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• 제7권1호
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• pp.6-9
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• 2015

The use of Intelligent Transportation System (ITS) is promising to bring better solutions for managing and handling the city traffic. This system combines many fields in advanced technology such as Global Positioning System (GPS), Geographic Information System (GIS) and so on. The basement of applications in ITS is the effective collections and data integration tools. The purpose of our research is to propose solutions which involve the use of GPS time series data collected from GPS devices in order to improve the quality of output traffic data. In this study, GPS data is collected from devices attached to vehicles travelling on routes in Ho Chi Minh City (HCMC). Then, GPS data is stored in database system to serve in many transportation applications. The proposed method combines the data usage level and data coverage to improve the quality of traffic data.

• International Journal of Computer Science & Network Security
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• 제22권6호
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• pp.246-250
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• 2022

The article analyzes the regulations of current criminal law and current issues, combating drug crime on the Internet, as well as measures to combat drug crime in the field of modern information technology. In connection with the growth of crimes in the field of drug trafficking committed with the use of information and telecommunications technologies, the urgent task of the state is to find effective ways to reduce drug crime. The article considers criminologically significant aspects of the mechanism of illicit drug trafficking, which is carried out with the use of information and telecommunication technologies and means of remote communication.

• 정보교육학회논문지
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• 제5권3호
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• pp.389-400
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• 2001

인터넷 게임은 인터넷의 등장과 함께 급속하게 보급된 형태로 사용자가 이용하기 쉽고 게임의 종류가 다양하고 재미있다는 점에서 현재 학교현장에서 실시되고 있는 ICT 교육에 효과적인 교육방법으로 응용될 수 있다. 따라서, 본 연구에서는 ICT 교육에 활용될 수 있는 여러 자원 중 인터넷 게임에 대하여 아동들의 인터넷 게임 사용실태를 분석하고, 데이터 마이닝의 의사결정나무를 통하여 아동의 컴퓨터 사용에 따른 인터넷 게임에 대한 패턴을 도출하며, 또한 교사들의 활용실태를 조사함으로써 인터넷 게임 개발 필요성과 이를 초등 ICT 교육에 보다 효과적으로 적용할 수 있는 실증적 방향을 제시하였다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제7권3호
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• pp.490-508
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• 2013

One of the most important scalability issues facing the current Internet is the rapidly increasing rate of BGP updates (BGP churn), to which route flap and path exploration are the two major contributors. Current countermeasures would either cause severe reachability loss or delay BGP convergence, and are becoming less attractive for the rising concern about routing convergence as the prevalence of Internet-based real time applications. Based on the observation that highly active prefixes usually repeatedly explore very few as-paths during path exploration, we propose a router-level mechanism, Path Exploration Aggregation (PEA), to scale BGP without either causing prefix unreachable or slowing routing convergence. PEA performs aggregation on the transient paths explored by a highly active prefix, and propagates the aggregated path instead to reduce the updates caused by as-path changes. Moreover, in order to avoid the use of unstable routes, PEA purposely prolongs the aggregated path via as-path prepending to make it less preferred in the perspective of downstream routers. With the BGP traces obtained from RouteViews and RIPE-RIS projects, PEA can reduce BGP updates by up to 63.1%, shorten path exploration duration by up to 53.3%, and accelerate the convergence 7.39 seconds on average per routing event.