• Proceedings of the Korea Multimedia Society Conference
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• 2003.11a
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• pp.1-4
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• 2003

최근에 침입 탐지 시스템은 네트워크 보안의 강화를 위해서 방화벽과 침입탐지 시스템 상호간의 연동으로 침입자의 연결 상태를 차단하는 방법도 개발되었다. 하지만 방화벽뿐만 아니라 침입탐지 시스템도 공격자에 의한 우회공격에 대해서는 아직 상당부분 방어할 수 없다. 또한 우회공격 탐지 모듈도 기존의 IDS와 Rule의 중복이 불가피하다. 본 논문은 취약점 진단 스크립트를 통해 IDS의 취약점 진단 후 IDS우회탐지공격 시스템의 Rule을 최적화 하여 우회공격을 효율적으로 탐지 해내는 시스템을 제안한다.

• 한국전산유체공학회:학술대회논문집
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• 2003.08a
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• pp.89-94
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• 2003

A successful store separation analysis tool, MSAP(Multi-body Separation Analysis Program) has been applied to F/A-18C/JDAM CFD Challenge II. The challenge was devised to challenge CFD community to use CFD methodologies to predict and match the trajectory of a JDAM MK-84 separating from F/A-l8C. Trajectory simulations for two flight conditions were performed. Comparison between computed and measured flight trajectories for both conditions shows a good agreement.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.06a
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• pp.91-94
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• 2011

Smart Grid에 사용되는 전기IT기기에서 Bluetooth의 보안 취약점이 발견되고 있다. 특히 전기안전을 위한 감시센서 정보전달을 맡고 있어서 위험성은 더욱 커진다. 본 논문은 Bluetooth가 탑재된 전기IT기기에 대한 Hacking Tool 분석을 실시하고, Bluetooth 취약점을 이용한 DoS, Sniffing공격 등 Tool 공격을 실행하고, Smart Grid와 U-IT 전기기기와 전력망에 대한 보안 방안 제시를 한다.

• Journal of Convergence for Information Technology
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• v.8 no.6
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• pp.209-215
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• 2018

In this paper, we propose a method to detect and block Meltdown malicious code which is increasing rapidly using dynamic sandbox tool. Although some patches are available for the vulnerability of Meltdown attack, patches are not applied intentionally due to the performance degradation of the system. Therefore, we propose a method to overcome the limitation of existing signature detection method by using machine learning method for infrastructures without active patches. First, to understand the principle of meltdown, we analyze operating system driving methods such as virtual memory, memory privilege check, pipelining and guessing execution, and CPU cache. And then, we extracted data by using Linux strace tool for detecting Meltdown malware. Finally, we implemented a decision tree based dynamic detection mechanism to identify the meltdown malicious code efficiently.

• Convergence Security Journal
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• v.19 no.2
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• pp.83-89
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• 2019

In accordance with information security compliance and security regulations, there is a need to develop regular and real-time concepts for cyber-infringement attacks against network system vulnerabilities in branch and periodic forms. Vulnerability Analysis Analysis It is judged that it will be a countermeasure against new hacking attack in case of concept validation by interworking with TOOL. Vulnerability check module is standardized in event attribute management and ease of operation. Opening in terms of global sharing of vulnerability data, owasp zap / Angry ip Etc. were investigated in the SIEM system with interlocking design implementation method. As a result, it was proved that the inspection events were monitored and transmitted to the SIEM console by the vulnerability module of web and network target. In consideration of this, ESM And SIEM system In this paper, we propose a new vulnerability analysis method based on the existing information security consultation and the results of applying this study. Refer to the integrated interrelationship analysis and reference Vulnerability target Goal Hacking It is judged to be a new active concept against invasion attack.

• Journal of Advanced Navigation Technology
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• v.13 no.6
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• pp.884-893
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• 2009

Recently, malicious attacks for Windows operate through Window API hooking in the Windows Kernel. This paper presents the API hooking attack and protection techniques based on Windows kernel. Also this paper develops a detection tool for Windows API hooking that enables to detect dll files which are operated in the kernel. Proposed tool can detect behaviors that imports from dll files or exports to dll files such as kernel32.dll, snmpapi.dll, ntdll.dll and advapidll.dll, etc.. Test results show that the tool can check name, location, and behavior of API in testing system.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.848-851
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• 2005

The BcN is applying from public networks to local networks and each terminal step by step until 2007. By IPv6 network introduction, IP address lack problem can be solved. However, the threats that network attacks of another method can be caused with new problem of network security in IPv6 networks. In this paper, we suggest the traffic analysis tool which analyze IPv6 traffic efficiently to detect/response network attack in IPv6 environment. The implemented IPv6 traffic analysis tool uses IPv6 header to analyze traffic and detect network attacks. Also, we also propose detection algorithm to detect network attacks in IPv6 networks.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.316-319
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• 2010

File security is typically protected by encryption methods. The development of a network environment, such as the Internet according to the sharing of information between systems become commonplace, while providing convenience to users, individuals or organizations that facilitate access to sensitive information caused by hacking the system to attack the rapidly growing is a trend. This paper is the latest generation file system caused by the hacking attacks on the Sniffing for users using file encryption and key generation, Packet Sniffing Tool IP and data through the analysis are discussed. Through this study, the importance of protecting personal information by imprinting Proactive in the hacking incident, and what users will contribute to increase the level of security awareness.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.4
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• pp.639-653
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• 2013

Smart grid is a network of computers and power infrastructure that monitor and manage energy usage efficiently. Recently, the smart grid demonstration projects around the world, including the United States, Europe, Japan, and the technology being developed. The protection of the many components of the grid against cyber-threats has always been critical, but the recent Smart grid has been threatened by a variety of cyber and physical attacks. We model and analyze advanced metering infrastructure(AMI) in smart grid. Using attack countermeasure tree(ACT) we show qualitative and probabilistic security analysis of AMI. We implement using SHARPE(Symbolic Hierarchical Automated Reliability and Performance Evaluator) tool and calculate probability, ROA, ROI, Structure Importance, Birnbaum Importance.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.7 no.7
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• pp.1721-1736
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• 2013

Black and gray hole attack is one kind of routing disturbing attacks and can bring great damage to the network. As a result, an efficient algorithm to detect black and gray attack is important. This paper demonstrate an adaptive approach to detecting black and gray hole attacks in ad hoc network based on a cross layer design. In network layer, we proposed a path-based method to overhear the next hop's action. This scheme does not send out extra control packets and saves the system resources of the detecting node. In MAC layer, a collision rate reporting system is established to estimate dynamic detecting threshold so as to lower the false positive rate under high network overload. We choose DSR protocol to test our algorithm and ns-2 as our simulation tool. Our experiment result verifies our theory: the average detection rate is above 90% and the false positive rate is below 10%. Moreover, the adaptive threshold strategy contributes to decrease the false positive rate.