• Journal of Digital Convergence
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• v.9 no.5
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• pp.11-20
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• 2011

Internet users and copyright holder have been at the center of a severe legal dispute because file-sharing soft (P2P) through Napster aggravates the violation of copyright as well as takes on the world. Though it is natural that we should hold users a criminal penalty for the illegal use of various computer programs, I think that if the supply of a computer program is generally within a circle of development act, program developer ought not to hold users criminally liable for the unintended illegal act of users. Two main issues are addressed in this work: (i) the basis and validity of legal responsibility and condemnation that appear in the precedent set as to P2P in America, Japan, and Korea. (ii) the necessity of both scientific technology development and efficient legal regulation of copyright holder. For this purpose, software development and legal regulation are reviewed analyzed from viewpoint of the criminal law.

• Journal of Information Technology Applications and Management
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• v.10 no.3
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• pp.1-22
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• 2003

P2P systems have been studied by many researchers in universities and commercial firms in recent years. In this study. we design and implement a system that makes UP for shortcomings of currently available P2P systems. Gnutella and Napster. The study also includes an efficiency analysis scheme conducted through a series of experimental data. The data sharing system of the study demonstrated duality of roles(client, service) of peers. But, their roles were separated from the existing client-server systems. Also, the study implements mechanism that shows the redundancy of data to communicate efficiently among peers for transferring data. The results of performance measure of the system shows that the amount of information shared by peers increases as the amount of peers increases but with no significant increase in response time. This constant response time is far more stable and faster than current file sharing systems. such as Gnutella and Napster. Business applications such as knowledge management, enterprise information portal management and transfer of data are done by use of supercomputers. They need to extend their systems to equip with more capacity and throughput as the number of clients increases. Moreover, they will face with more complicated problems if integration with new systems exists. If this JDSS is introduced to these business applications. it would easily augment scalability of the system with high performance at less expense.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.172-174
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• 2003

통신기술과 인터넷의 급속한 발달로 Napster와 Gnutella와 같은 P2P시스템이 등장하였다. P2P시스템은 피어간의 정보와 데이터를 직접 공유하는데 널리 이용되고 있다 MagicSquare는 동적인 (Dynamic) 환경에서 작동할 수 있도록 설계한 P2P 프로토콜이다. MagicSquare는 피어의 컴퓨팅 능력을 고려하기 때문에 각 피어에 대한 자원의 낭비를 최소화할 수 있지만. P2P 네트워크에 참여하는 피어의 물리적인 특성은 고려하지 않았다. 본 논문에서는 피어의 저장 공간의 크기, 사용할 수 있는 네트워크 대역폭, 피어가 가지는 특징을 고려하여 MagicSquare을 확장한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.89-92
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• 2005

Centralized P2P system, Napster and Unstructured P2P system, Gnutella accomplish main current. Centralized system and unstructured system have a restriction in a scalability. To solve the this problem, structured system is appeared. CAN, Chord, Pastry and Tapestry are delegation of this system. Although structured system don't aware physical proximity of node because it uses Distribute Hash Table. In proposing system, a node can communicate with physical proximity of node using concept of LAN. Internet traffic is also decreased because communication in the Chord network divide in two(original network and sub network).

• Proceedings of the Korean Information Science Society Conference
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• 2003.04d
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• pp.163-165
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• 2003

P2P 시스템의 주요 이슈는 자원 (resource) 을 효율적으로 저장하고 찾는 것이다. 자원 탐색 프로토콜은 초기의 Napster, Gnutella와 같은 형태에서 발전하여, 현재는 분산 해시 테이블 (Distributed Hash Table을 사용한 형태로 발전하고 있다. 본 논문에서는 분산 해시 테이블을 사용한 P2P 프로토콜인 Magic Square를 제안한다. Magic Square에 참여하는 칵 노드는 양방향 스킬리스트로 구성된 지역 라우팅 테이블과 임의의 노드로 구성된 전역 라우팅 테이블을 가진다. 지역 라우팅 테이블은 각 노드의 능력을 고려하여 구성된다. 스킵리스트를 사용하였기 때문에 탐색과 노드의 추가라 삭제 과정이 간단하며. P2P 네트워크가 자주 바뀌어도 큰 영향을 받지 않는다.

• The Journal of the Korea Contents Association
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• v.13 no.7
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• pp.158-167
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• 2013

This research examines the legal liability of place-shifting of TV contents by the use of the Slingbox. The place-shifting of TV contents is fair use because it is a non-commercial private use based on the relevant case law regarding time-shifting and device-shifting such as Sony, RIAA and Napster. But the sharing of place-shifting function is likely to be liable for copyright infringement. And place-shifting may not be fair use based on the cases which denied fair use of time-shifting and space-shifting because the consumers' convenience for the use of the copyrighted work is against the purpose of legislation of copyright law. Place-shifting is unlikely to have a significant effect on the potential market for TV contents because it presents lucrative new platforms to disseminate TV contents to computers and mobile devices. However it is likely to have negative effect because various devices can be the follow-up marketplaces of the copyright holders of TV contents. This study proposes the "innovative medium defense," a new doctrine to analyze liability of innovative media.