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박경민,우사무엘,문대성,김익균,Park, K.M.,Woo, S.,Moon, D.S.,Kim, I.K. 한국전자통신연구원 2017 전자통신동향분석 Vol.32 No.6
Moving Target Defense(MTD) is a novel security technology concept in which the IT infrastructure changes its form actively and prevents various types of cyber attacks. Network address moving technology is the field that has been most actively researched in terms of MTD. A number of studies on network address moving published over the last decade have suggested a virtual address-based network address moving technology for efficiency in the implementation. However, virtual address-based network address moving technology has serious vulnerabilities in terms of security and availability. This paper examines the technological characteristics of the existing studies and analyzes their limitations. It suggests security requirements to be considered when designing the network address moving technology through a technological analysis.
CFD-DEM 기반 액체 밀도가 액체-기체-입자 다상유동 댐 붕괴에 미치는 영향에 대한 수치적 연구
김민일(M.I. Kim),윤현식(H.S. Yoon),박경민(K.M. Park) 한국전산유체공학회 2018 한국전산유체공학회지 Vol.23 No.2
The present study investigated the dam break flow containing the multiphase of the liquid-gas-particles. To investigate the effect of liquid density, four different liquid densities is considered 1000, 1500, 2000 and 2400kg/m³. The density ratio of the particle to the liquid is defined as DR. Thus, the liquid densities correpond to the values of 1.04, 1.25, 1.67 and 2.5. for DR. The open source codes, OpenFOAM and CFDEMproject, were used to numerically simulate the complex multiphase flow. These codes for this problem has been successfully validated in authors’s recent paper of Park et al.[16]. Regardless of DR, the front head of the particles approaches earlier than that of the liquid to the opposite wall. The difference of the arrival time between the front heads of the particles and the liquid becomes smaller with increasing DR. The time evolution of the free surface and the particles apparently explain the dependence of the front head positions of the liquid and particles on DR.
김민재,박경민,박종근,김영수,이종훈,문대성,Kim, M.J.,Park, K.M.,Park, J.G.,Kim, Y.S.,Lee, J.H.,Moon, D.S. 한국전자통신연구원 2021 전자통신동향분석 Vol.36 No.2
5G networks are rapidly expanding. Simultaneously, the need for a testbed-not a commercial network-is increasing to verify aspects such as 5G network security vulnerabilities. Open-source projects in 4G networks already exist and are implemented similarly in commercial networks. Due to the compatibilty between 5G and 4G networks, 5G networks are being developed and implemented as open-source projects on the basis of 4G networks. In this study, we review the development trends of 5G open-source projects and simulators that can be used for 5G research.