• 디지털산업정보학회논문지
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• 제9권4호
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• pp.251-265
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• 2013

The emergence of social network services, is changing the foundation of human relationship formation and method of communication of individuals through sharing of free information. Social network service is a service to support or facilitate an on-line extension of off-line network among people by helping them to share personal profile. History of social network services very short. But users of the various layers is increasing rapidly and ripple effect social as a result is very large. The focus of existing research was mainly devoted to motivation of use and acceptance of social network services. Currently the use of SNS was maturing. Thus, in-depth research on the use pattern of SNS users is needed. The purpose of this study is that, for Facebook in social network services, to analyze the changes in the initial stage of use, medium-term, usage patterns at the current time. Results of the study by analyzing the characteristics of the change in the pattern of usage of user of Facebook, it can be used as basic materials for SNS researchers and service provider.

• 디지털융복합연구
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• 제10권10호
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• pp.147-154
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• 2012

한국형 SNS의 성장 가능성을 알아보기 위해 국내 1위 모바일 IM인 카카오톡 사례를 중심으로 분석해본 결과 다음의 사항들을 발견할 수 있었다. 첫째, 카카오톡은 PC상의 메신저 서비스와 다르게 모바일 IM 서비스를 바탕으로 소셜서비스 회사로 진화하고 있었다. 둘째, 카카오톡은 다양한 소셜서비스(사진기반 카카오스토리, 게임 마케팅 플랫폼 게임센터 등)를 시도하여 성공적으로 SNS 회사로 안착하였다. 셋째, 트위터의 사례처럼 플러스친구를 통한 뉴스 서비스, 아바타 및 앱스토어 등을 통해서 소셜미디어 및 소셜플랫폼 회사로 진화하고 있었다. 이런 한국시장에서 카카오톡의 성공은 NHN의 라인을 통해 일본 및 동남아시장에서 확대 재생산되고 있다. 라인은 카카오톡의 다양한 검증된 SNS 실험들을 일본시장에 적용시킴으로써 그 성공을 이어가려고 하고 있다. 온라인 웹서비스 싸이월드가 SNS로 세계시장에서 이루지 못한 것을 모바일 IM인 카카오톡, 라인은 그 성공 가능성을 한층 높여 주고 있다.

• 한국철도학회논문집
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• 제11권5호
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• pp.482-488
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• 2008

국내 최초로 민간자본이 투자된 대형 지하철인 서울 9호선은 김포공항과 강남을 연결하는 1차 구간이 2009년 개통을 앞두고 있다. 지자체와 민간이 시설을 건설하고 전문 공공교통 서비스회사가 운영을 맡는 9호선은 보유한 자원을 최고로 활용하여 최대의 효율성을 이끌어낼 필요가 있으며, 관련 기관과의 적극적인 협력을 통한 핵심역량발휘와 경쟁력 제고가 필요하다. 본고에서는 9호선 운영분야에 초점을 맞추어 완급결합을 중심으로 한 9호선 운전체계와, 타 교통수단과의 연계, 공항철도와의 효과적인 직결운행 측면에서 9호선의 운영개선 방안을 제시한다.

• 대한안전경영과학회지
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• 제14권1호
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• pp.137-145
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• 2012

In the previous study, the construction guide line of IT infra-structure for a u-City was introduced. However, it is only concentrated on the components and construction procedure for provider-oriented and technology-oriented sensor networks. In this paper the architecture and building process of demander-oriented sensor networks for sustainable u-City service are proposed. In the paper it is described (1) the enhancement methods of the procedure that can be flexibly constructed according to the scale of the project, (2) the methods that can improve the structure from the wireless sensor network such as RFID/USN to the hybrid sensor network, and (3) the consideration factors for providing the sustainable u-City service.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2005년도 추계종합학술대회
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• pp.736-739
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• 2005

케이블망개방(Open Access)은 케이블망사업자가 자사의 ISP(Internet Service Provider) 뿐만 아니라 경쟁 IS도 케이블 모뎀망에 접속할 수 있도록 허용하는 것이다. 미국의 케이블사업자들은 주된 사업영역인 케이블방송 서비스 이외에 케이블 모뎀망을 이용한 브로드밴드 서비스를 제공하고 있다. 케이블모뎀서비스는 비규제 대상인 주간정보서비스(interstate information service)로 규정되어 케이블망개방 의무가 부과되지 않는다. 최근 FCC(Federal Communication Commission)는 통신사업자의 DSL(Digital Subscriber Line) 방식에 기초한 브로드밴드 접속서비스를 기능적으로 전기통신 요소와 결합된 정보서비스(Information Service)로 정의하고 통신사업자에게 부과된 DSL 망의 개방의무도 철회하였다. 이러한 미국의 케이블모뎀 망과 DSL 망에 대한 비규제 접근은 시장의 수요와 기술변화를 고려한 것으로, 케이블망사업자 및 통신사업자 모두에게 설비투자 유인을 제공하여 브로드밴드의 보급을 촉진하기 위한 것이다.

• 디지털산업정보학회논문지
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• 제6권1호
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• pp.115-129
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• 2010

As the fixed mobile communication tools using the internet are developed, the off-line services are serviced through on-line on the internet. our society is divided into the real world and the cyber world. In the cyber world, the authentication to the user is absolutely required. The authentication is divided into the real-name authentication and the anonymous authentication by the kind of the internet service provider. There are some ISPs needed the real-name authentication and there are others ISPs needed the anonymity authentication. The research about the anonymity authentication is steadily established to these days. In this paper, we analyze the problem about blind signature, group signature, ring signature, and traceable signature. And we propose a method of anonymity authentication using the public certificate. In the proposal, the anonymity certificate have the new structure and management. Certificate Authority issues several anonymity certificates to a user through the real-name authentication. Several anonymity certificates give non-linked and non-traceability to the attacker.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1662-1664
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• 2007

As the logistic environment of digital contents is rapidly changing, the protection of the digital rights for digital content has been recognized as one of critical issues. Digital Right Management(DRM) has taken much interest Internet Service Provider(ISP), authors and publishers of digital content as an interested approach to create a trusted environment for access and use of digital resources. This paper propose an interested digital rights protection scheme using license agent to address problems facing contemporary DRM approached : static digital rights management, and limited application to on-line environment. We introduce a dynamic mission control technology to realize dynamic digital rights management. And we incorporate license agent to on- and off-line monitoring and tracking. The proposed system prevent illegal access and use by using PKI security method, real time action monitoring for user, data security for itself.

• Asia pacific journal of information systems
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• 제14권3호
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• pp.23-55
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• 2004

Interests on Service Level Agreement(SLA), an immanence operating tool for managing the level of the information system service objectively and qualitatively, were raised among IT outsourcing service providers, outsourcers, and operating departments. Yet, only a few domestic conglomerates adopted the SLA, and exact usage of the SLA is currently unknown. Because of the importance of the SLA between a service recipient and a service provider, the agreement is treated with high confidentiality. This raised the problems to organizations which are considering the SLA but lack in the concrete guide line to internalize SLA management process. This study provides the process model of implementation for SLA by conducting multiple case research. The sampled companies are currently implementing the SLA over 1 year of usage period. Factors were used to provide the managerial contribution for implementing the SLA. To analyse the case samples, in-depth interview method was conducted for each sampled company. As a result, if SLA can be used as an immanence managerial tool and can be actively implemented, it will be an strategic tool for various decision making in IT management practice with long term relationship, better shared partnership, and continuous service improvement.

• 한국중재학회지:중재연구
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• 제12권1호
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• pp.123-169
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• 2002

The Advent of the global information structure and the do-called digital revolution raise countless new issues and questions. There are no limitations regulating the expressions on the cyberspace due to internet's of quality anonymity\ulcorner diversity\ulcorner spontaneity. Therefore, the freedom of speech is expanded in both areas of time and space, which was impossible with the old communicating system. The rapid development of the internet may not have occurred without techniques of linking and framing, which provide users flexible and easy access to other website. These techniques have enabled internet users to navigate the internet efficiently and sort through the products, services and information available on the internet. Although online technology raises many new legal issues, the law available to help us resolve them, at least today, is largely based on the world as it existed before online commerce became a reality. Thus the challenge is to predict how these new legal issues may be resolved using the current law. Especially, the damage from the above side effects on the cyberspace can be much more serious than in the real world because of promptness, wideness and anonymity. Therefore, regulating and controling the freedom of speech on the cyberspace became needed, and there are two kinds of opinion; one is that the laws in the real world should be applied for the cyberspace and the other is that regulating and controling the freedom of speech on the cyberspace should be performed by the users of cyberspace not by laws because the cyberspace is a free space and must not be interfered. In this study, the current judicial regulation of cyberspace, the side effects of cyberspace and the limitations of the freedom of speech are studied to solve the above problems with speech and the liabilities of on-line service providers are discussed around defamation the distribution of obscene pictures and information, and infringement of copyright.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권12호
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• pp.5572-5595
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• 2016

Multi-server authentication enables the subscribers to enjoy an assortment of services from various service providers based on a single registration from any registration centre. Previously, a subscriber had to register from each service provider individually to avail respective services relying on single server authentication. In the past, a number of multi-server authentication techniques can be witnessed that employed lightweight and even computationally intensive cryptographic operations. In line with this, Zhu has presented a chaotic map based multi-server authentication scheme recently, which is not only vulnerable to denial-of-service attack, stolen-verifier attack, but also lacks anonymity. This research aims at improving the Zhu's protocol in terms of cost and efficiency. Moreover, the comparative study is presented for the performance of improved model against the existing scheme, and the security of proposed model is formally proved using BAN Logic.