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Indicator-based Behavior Ontology for Detecting Insider Threats in Network Systems
( Janghyuk Kauh ),( Wongi Lim ),( Koohyung Kwon ),( Jong-eon Lee ),( Jung-jae Kim ),( Minwoo Ryu ),( Si-ho Cha ) 한국인터넷정보학회 2017 KSII Transactions on Internet and Information Syst Vol.11 No.10
Malicious insider threats have increased recently, and methods of the threats are diversifying every day. These insider threats are becoming a significant problem in corporations and governments today. From a technology standpoint, detecting potential insider threats is difficult in early stage because it is unpredictable. In order to prevent insider threats in early stage, it is necessary to collect all of insiders’ data which flow in network systems, and then analyze whether the data are potential threat or not. However, analyzing all of data makes us spend too much time and cost. In addition, we need a large repository in order to collect and manage these data. To resolve this problem, we develop an indicator-based behavior ontology (IB2O) that allows us to understand and interpret insiders’ data packets, and then to detect potential threats in early stage in network systems including social networks and company networks. To show feasibility of the behavior ontology, we developed a prototype platform called Insider Threat Detecting Extractor (ITDE) for detecting potential insider threats in early stage based on the behavior ontology. Finally, we showed how the behavior ontology would help detect potential inside threats in network system. We expect that the behavior ontology will be able to contribute to detecting malicious insider threats in early stage.
네트워크 Performance를 고려한 ABR서비스의 셀율 증가 / 감소에 관한 연구
고장혁(Kauh Janghyuk),김광현(Kim kwanghyun),이동호(Lee Dongho) 한국정보과학회 1997 한국정보과학회 학술발표논문집 Vol.24 No.2Ⅲ
ATM-Forum에서는 기존의 telnet, ftp 등과 같은 LAN서비스와 VOD서비스등을 수용하는 적절한 서비스로 ABR, UBR서비스를 권고하고 있다. 그러나 UBR서비스의 경우는 단순히 PCR만을 지원하기 때문에 다양한 QOS를 만족하기 힘들다. 따라서 ABR서비스가 주로 권고되고 있다. 본 논문에서는 이러한 ABR서비스의 트래픽을 제어하기 위한 방법으로 현재 표준으로 정해진 Rate 기반의 제어 방식으로 셀율(Cell Rate)의 증가 및 감소 방식을 다양하게 비교 분석한다. 또 기존의 연구에서 가장 좋은 방법으로 생각되고 있는 가산적인 증가와 배수적인 감소 방법이 수학적 및 시뮬레이션을 통해 다른 방법과 비교하여 보다 성능이 우수하다는 사실을 보이고, 네트워크의 Performance를 고려한 새로운 알고리즘을 제시하여 시뮬레이션을 통해 기존의 방법과 비교 분석한다.
고장혁(Kauh Jang Hyuk),이동호(Lee Dong Hoo) 한국정보처리학회 1999 정보처리학회논문지 Vol.6 No.3
It was already proved that ATM has stability and flexibility of service application, but because of the various cahracteristics of traffics and the QoS on user demand caused by them, there are a lot of researches for traffic management method. However, there are a few of researches for ATM routing method acting on traffic management practically. In this paper, we focus on multi-path routing method transporting cells with multimple paths and compare this method with existing single path routing method and analyze multi-path routing method into three elements with isimple formula and propose new methods improving the performance of ATM routing and simulate these methods.