• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.1B
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• pp.56-70
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• 2006

This study attempts to estimate the size of economic value that could be created by the adoption of a new internet protocol, IPv6. The existence of externality and diffusion effects in the adoption of a new platform technology makes it difficult to capture the exact costs and benefits of IPv6 adoption. Hence, this study employed multiple evaluation methods rather than relying on single method to increase the validity of results by averaging the value of different methods. Futhermore, the proposed evaluation model includes qualitative variables such as expert opinions, as well as quantitative variables, to incorporate various stakeholders' perspectives. Finally, the policy implications for IPv6 adoption and the limitations of this study are discussed.

• The Journal of the Korea Contents Association
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• v.5 no.2
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• pp.115-121
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• 2005

In the present internet environment, various traffic flooding attacks and worm attacks cause economical loss. If IPv4 is substituted by IPv6 because of the lack of IP address, it will be more serious. Therefore, we design and implement the traffic analysis tool which can detect attacks by expecting them encountered in the IPv6 environment. Proposed tool is composed of packet generation module, packet gathering module, discrimination module, and display module in X-windows. As a simulation result, it is proved that it can effectively detect DAD-NA message attack, TCP SYN flooding attack, UDP flooding attack and ICMP flooding attack in the IPv6 environment.

• Proceedings of the Korean Journal of Food and Nutrition Conference
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• 1998.06a
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• pp.91-102
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• 1998

이제 HACCP가 무엇이며 왜 이것을 단체 급식소에 적용해야 할 것인가의 것은 더 이상 논의 과제가 아니다. 문제는 어떻게 HACCP 원리를 주방 동선 구성에 적용할 것이며 동시에 이 원리 기준에 적합한 주방 기계 선정 및 운영 절차는 무엇인가에 관한 하드웨어적 접근에 관심이 모여지고 있다. 작은 정부를 주장하는 메리랜드 주에서는 미국에서 최초로 새로운 조리 시설을 짓거나 전반적 보수공사 하는 모든 외식업체는 HACCP Plan을 제출한 후 통과된 경우에 한하여 공사 허가서를 내어주고 있다. 이로써 업체 종사원 스스로가 위생 상태를 점검 기록함으로 함으로 식중독 사고를 사전에 예방함과 동시에 공무원의 업체 방문을 최소화 하여 적은 인원으로 효율적인 주 정부 운영을 하고 있는 것이다. 또한 자발적으로 많은 외식 업체들이 마케팅 차원에서 경쟁 업체와의 차별화 정책의 일환으로 스스로 서둘러 HACCP를 도입하고 있다. 워싱턴 DC지역에서는 요식협회 스스로 HACCP를 도입한 외식업소에 "Extra Step"이라는 로고를 사용케 하고 있다. 이로써 보다 많은 고객들이 이 로고를 보고 해당 식당을 선택토록 광고의 효과를 더 하기 위함이다. 당연히 이와 같은 추세에 따라 유럽과 미국의 세계적인 주방 기기 메이커들도 미국의 National Sanitation Foundation(NSF), US Dept of Agriculture(USDA) 및 FDA 의 규제 흐름에 따라 상당히 빠른 속도로 HACCP 원리에 적합한 기능을 기계적으로 보완해 가고 있다. 최근 4/15/98, FDA가 대량 급식소를 포함한 주방의 HACCP 적용매뉴얼을 인터넷 web 주소 http://vm.cfsan.fda.gov/~dms/ hret-1.htm 통하여 발표한 내용과 미 육군의 식당 위생 기술 자료 TB MED 530 자료, 그리고 87년 12월 이후 (주)HRS 에서 기계 설치 사후 관리하면서 경험한 사항을 중심으로 다음 내용을 정리해 보고자 한다.리해 보고자 한다.

• Journal of Korea Society of Industrial Information Systems
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• v.11 no.3
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• pp.34-39
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• 2006

This paper introduces a network security situation awareness tool using a traffic pattern map which facilitates recognizing a current network status by extracting and analyzing predetermined traffic features and displaying an abnormal or harmful traffic which deteriorates network performance. The traffic pattern-map consists of $26{\times}26$ intersections, on which the occupancy rate of the port having maximum occupancy is displayed as a bar graph. In general, in case of the Internet worm, the source address section on the traffic pattern map is activated. In case of DDoS the destination address section is activated.

• KSCI Review
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• v.15 no.1
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• pp.53-64
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• 2007

Avoid at damage systems in order to avoid own IP address exposure, and an invader does not attack directly a system in recent hacking accidents at these papers, and use Stepping stone and carry out a roundabout attack. Use network audit Policy and use a CIS, AIAA technique and algorithm, the Sleep Watermark Tracking technique that used Thumbprints Algorithm, Timing based Algorithm, TCP Sequence number at network bases, and Presented a traceback system at TCP bases at log bases, and be at these papers Use the existing algorithm that is not one module in a system one harm for responding to invasion technology develop day by day in order to supplement the disadvantage where is physical logical complexity of configuration of present Internet network is large, and to have a fast technology development speed, and presentation will do an effective traceback system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.146-149
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• 2005

Confusion of network traffic is increased by increasing of internet user and large of network, Specially olded one and one communication caused loss of bandwidth because of redundant packet by increasing video conference and internet broadcasting. Thereupon multicast technique, method reducing loss of bandwith, for multimedia data transmission was proposed. This paper proposes method to solve overhead problem in the middle router through group management and capsuling with the Xcast technique added Disignated Router(DR). To solve the middle router not supporting IPv6, Xcast using tunneling technique in the IPv6 design and analyze the performance through a simulated examination.

• Annual Conference of KIPS
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• 2014.11a
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• pp.482-485
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• 2014

온라인 중고물품 거래의 장점은 인터넷을 사용하는 모든 사용자에게 자신이 팔고자 하는 물건을 쉽게 알릴수 있다는것이다. 하지만 온라인에서 중고물품 거래 시에 개인의 정보를 노출할 경우가 많아지게 되는데 이는 프라이버시를 침해할 수 있다. 온라인 중고물품거래시에 사용자들은 자신이 판매하는 물건과 함께 이메일 주소나 핸드폰 번호를 노출하게 되는데 이 정보를 소셜네트워크서비스에 연결하면 특정인에 정보를 획득할 수 있게 된다. 공격자는 온라인 중고물품거래가 진행되는 곳에서 특정인에 대한 정보를 획득한뒤 소셜네트워크서비스와 정보를 연결하여 특정인에 대한 스토킹이나 피싱, 금융사기같은 범죄를 할 가능성이 있다. 본 논문에서는 개인정보노출에 대한 위험성을 알아보기 위해 중고물품 사이트에서 획득한 개인정보를 소셜네트워크서비스에 연결하여 개인 식별가능성을 실험해 보았으며 이를 막기 위한 방법을 제안하였다.

• The Journal of Engineering Research
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• v.6 no.2
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• pp.125-130
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• 2004

In the current Internet, IP addresses does not support Mobility and Multi-homming because it depend on their topological location. To resolve these problems, IETF hip WG introduces Host Identity Protocol that separates the endpoint identifier and locator roles of IP addresses. However the DNS that was presented for the HIP had only a part of the expansion design from the existing DNS function, so it was not an absolute complete method. This paper propose how the dymanic DNS has been designed so that it support the HIP completely. We added the Host Identity Namespace and the Rendezvous Server Namespace, defined the new PRs in DNS.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.17 no.5
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• pp.117-130
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• 2007

A honeypot is a security resource whose value lies in being attack. It collects data regarding the attack strategies and tools of hackers. However, the honeypot is normally located at a single point, and the possibility is small that a hacker will attack it. Unused ports-based decoy systems which gather data about hackers activities have been developed to complement honeypots. However, the systems have some problems to be deployed in actual environment. In this paper, we propose an agent-based system which enhances shortcomings of the unused ports-based decoy systems. It makes honeypot gather more information regarding hacker activities and protects clients from attacks. Moreover, the proposed system can increase the chance of tracking hackers activities without wasting additional IP addresses and computer hardwares.

• Journal of dental hygiene science
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• v.3 no.2
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• pp.77-82
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• 2003

The purpose of this study was to examine the characteristics of dental homepages in korea to discuss how they could be improved better. The findings of this study could be described as below : First, dental homepage should include differentiated, specialized content and features. Second, the use of three-dimensional image or multimedia would contribute to increasing people's understanding of dental treatment or general dental information and elevating the effectiveness of dental publicity activities. Third, the want ad and order system used by the business sector or hospital would serve to multiply the management efficiency of dental institutions. Fourth, dental hospitals and clinics that belong to the same network or franchise need to make publicity banner for feasible mutual link, and the use of the same homepage design or common logo would be effective for better image and publicity activities. Fifth, it would be convenient to add the map search function or inquiry system. Seventh, if multiple types of services, such as entertainment or game, are prepared, it would be possible for dental institutions to project a better image and to induce visitors to hit the sites again.