• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.4
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• pp.191-199
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• 2014

Currently, HTTP traffic has been developed rapidly due to appearance of various applications and services based web. Accordingly, HTTP Traffic classification is necessary to effective network management. Among the various signature-based method, Payload signature-based classification method is effective to analyze various aspects of HTTP traffic. However, the payload signature-based method has a significant drawback in high-speed network environment due to the slow processing speed than other classification methods such as header, statistic signature-based. Therefore, we proposed various classification method of HTTP Traffic based HTTP signatures of hierarchical structure and to improve pattern matching speed reflect the hierarchical structure features. The proposed method achieved more performance than aho-corasick to applying real campus network traffic.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.1
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• pp.67-74
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• 2009

Information Effluence leaks are caused by the wide use of the P2P program in Japan and Korea lead by the increase of internet use and network infrastructure expansion. This research confirms the seriousness of the data collected from the P2P leaks of the two countries and furthers its study by researching how countermeasures are applied. The effectiveness is verified by collecting data according to countermeasure applied periods. Both countries had information leaks, but in the case of Japan, not only personal information leaks but corporation, administrative agency, military, and others in a wide range as well. As a countermeasure against information effluence, Korea is enforcing counter plans mainly against the P2P service businesses and for Japan, various plans are taken such as business guides for each agency, organization management, SW development and supply, HW supply, and ect. The leaks in Japan were more severe than the ones in Korea but they had well planned countermeasures that were applied. Therefore if the Japanese countermeasure on information effluence of P2P programs is taken as a lesson, Korea can prevent the problem of leaks beforehand.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.6
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• pp.41-48
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• 2008

The realization of a monitoring system for senior citizens living alone through wireless sensor network. Due to the recent advances in medical science, people live longer than ever before which accelerates the number of senior citizens. The high rate of the old people in population causes some changes in the form of families, which results in the increasing number of old people living by themselves. This also causes a lot of social problems concerning aging population. For example, people found a dead body of 83-year-old, who had lived alone, after he passed away a month before. There is a national monitoring service for the old people of their daily lives, but the application of such system is very limited. Considering this, the current paper focuses on the realization of a monitoring system for senior citizens living alone through wireless sensor network. The system consists of ZigBee sensor network, which is based on standard IEEE 802.15.4. and the system uses Tmote Sky sensor mote made by Moteive, which is installed with TinyOS. The circumstances information data will be saved on DB and a household will be monitored through a Webpage or Mobile.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.28 no.3
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• pp.591-603
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• 2018

Windows Event Log is a format that records system log in Windows operating system and methodically manages information about system operation. An event can be caused by system itself or by user's specific actions, and some event logs can be used for corporate security audits, malware detection and so on. In this paper, we choose actions related to corporate security audit and malware detection (External storage connection, Application install, Shared folder usage, Printer usage, Remote connection/disconnection, File/Registry manipulation, Process creation, DNS query, Windows service, PC startup/shutdown, Log on/off, Power saving mode, Network connection/disconnection, Event log deletion and System time change), which can be detected through event log analysis and classify event IDs that occur in each situation. Also, the existing event log tools only include functions related to the EVTX file parse and it is difficult to track user's behavior when used in a forensic investigation. So we implemented new analysis tool in this study which parses EVTX files and user behaviors.

• 대한예방의학회:학술대회논문집
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• 2001.04a
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• pp.27-38
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• 2001

보건소 정보화 사업은 지역단위 공공보건의료의 최일선 기관인 보건소에 정보시스템을 설치하여 내부운영을 효율화하고 생산성을 증대시킴으로써 양질의 보건의료 서비스를 제공하고, 동시에 지역보건의료의 효과적인 정보체계 구축과 정보의 원활한 교류를 통하여 국가보건정책수립을 위한 기본정보를 제공하며, 이를 통해 공공보건의료의 환경변화를 이끌어 갈 기반을 확충하려는 목적으로 추진되었다. 보건소 전산화 사업을 근간으로 하는 지역보건의료분야 정보화 사업은 보건 의료부문의 정보화를 위한 국민복지망 기본계획에 의거하여 94년 12월부터 2기로 나누어 8차 년도에 걸쳐('94.12 $\sim$ '01. 10) 연차사업으로 시행 중에 있다. 보건소 정보화 프로그램 개발을 목적으로 시행된 제1기 정보화 사업('94.12 $\sim$ '98.7)을 통해 개발된 보건소 정보시스템이 현재 242개 보건소 중 108개 보건소에서 사용중이며, 이를 통해 보건소 업무의 효율화와 함께 지역보건의료분야 전산화 구축의 기초단계가 확립되었다. 제2기 사업은('98.10 $\sim$ '01.10) 보건소 중심의 지역보건의료망 구축과, 보건소 정보시스템의 전국 확산, 관련기관 정보망과의 연계를 통한 정보교류 확대와 정보활용도 제고 등의 목표로 시행중이다. 2기 1차 사업을 통하여 보건소-보건지소 진료소간 지역보건의료망의 기본 하부골격의 토대가 구축되었고, 2기 2차 사업에서는 보건의료원의 전산화 프로그램이 개발되었다. 또한 현재 진행중인 2기 3차 사업에서는 지역보건정책 수립을 지원하는 진료현황, 보건사업현황 등의 자료를 통합D/B로 구축하여 시범적으로 운영함으로써 정보망의 활용도를 높이고, 광역단위의 지역보건정보 의사결정시스템(EIS) 개발을 추진하고 있다. 한편, 최근 급속한 정보기술의 발달과 보건의료 환경의 변화로 인하여 보건정보시스템의 변화 필요성이 증대되고 있다. 이를 위해서 중앙정부와 광역자치단체, 보건소를 연결하는 전국 단위 정보네트워크 구축에 있어 신기술 적용방안 연구를 통하여 보건소 정보화 사업의 발전 방향(ISP)을 모색 중에 있으며, 시군구 행정정보망과 연계를 통해 생애주기에 따른 주민 평생건강관리를 위한 정보시스템 구축을 도모하고 있다.

• Journal of Digital Convergence
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• v.13 no.6
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• pp.29-37
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• 2015

Entering the convergence education era, the emergence of smart devices removed the constraint of time and space for study, so if we use smart devices appropriately for education, it will strengthen students' abilities and cultivate creative human resource. Therefore the current study analyzed the general application condition of the smart devices through surveys targeted to students and proposed a measure in applying the smart device as an educational information. In relation to information application, a test was proceeded after carrying out education targeted to experiment group students by naming the group information search, communication, cooperation, sharing, report generation, data storage, online assessment and project management activity. Through the test and survey analysis, it was discovered that the experiment group students displayed higher self-efficacy and ability in applying the smart device as information compared to the control group.

• Journal of Korea Multimedia Society
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• v.13 no.4
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• pp.575-581
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• 2010

With widespread use of the Internet and improvements in streaming media and compression technology, digital music, video, and image can be distributed instantaneously across the Internet to end-users. However, most conventional Digital Right Management are often not secure and not fast enough to process the vast amount of data generated by the multimedia applications to meet the real-time constraints. The SVC offers temporal, spatial, and SNR scalability to varying network bandwidth and different application needs. Meanwhile, for many multimedia services, security is an important component to restrict unauthorized content access and distribution. This suggests the need for new cryptography system implementations that can operate at SVC. In this paper, we propose a new scrambling encryption for reserving the characteristic of scalability in MPEG4-SVC. In the base layer, the proposed algorithm is applied and performed the selective scambling. And it encrypts various MVS and intra-mode scrambling in the enhancement layer. In the decryption, it decrypts each encrypted layers by using another encrypted keys. Throughout the experimental results, the proposed algorithms have low complexity in encryption and the robustness of communication errors.

• The KIPS Transactions:PartB
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• v.9B no.3
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• pp.303-310
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• 2002

In this paper, we propose a proxy caching scheme that stores a portion of a continuous media object or an entire object on the Internet. The proxy stores the initial fraction of a continuous media object and determines the optimal size of the initial fraction of the continuous media object to be cached based on the object popularity. Under the proposed scheme, the initial latency of most clients and the data transferred from a remote server can be reduced and limited cache storage space can be utilized efficiently. Considering the characteristics of continuous media, we also propose the novel popularity for the continuous media objects based on the amount of the data of each object played by the clients. Finally, we have performed trace-driven simulations to evaluate our caching scheme and the popularity for the continuous media objects. Through these simulations, we have verified that our caching scheme, PPC outperforms other well-known caching schemes in terms of BHR, DSR and replacement and that popularity for the continuous media objects based on the amount of the playback data can enhance the performance of caching scheme.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.8 no.8
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• pp.1783-1789
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• 2004

It is evaluated that there is infinit capability of creating new e business using P2P program. but the research for the method to protect the copyright of digital contents is urgent even for development of the p2p service because the problem of copyright protection for digital contents is not solved. Though this article, it can be induced that reliable contents sharing use to a flow fund by secure settlement architecture, user authentication and contents encryption and then it as the problem of copyright fee is solved, it is able to discontinue which trouble with a creation work for copyright fee and protection it's once again as growth of p2p market, p2p protocal is will be grow into a important protocal of advanced network. In this article, When users send digital contants to each other in internet, we proposed the P2P DRM algorism to offer a security function which using the technology of copyright management to use a AES Algorithm based on PKI.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.6
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• pp.1359-1367
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• 2015

Digital Signage is a service which displays a variety of information or advertizement on digital display connected with communication network in commercial or public places. In this paper, We present a digital signage software solution named Xibo4u providing personalized advertisement. Xibo4u is composed of a server managing category and contents of advertisement, digital displays showing advertisement based on the categories specific to customers, and a smartphone application which enables customers to designate their favorite categories of advertisement. Xibo4u is developed by extending the Xibo open source software.