• Journal of Digital Convergence
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• v.8 no.2
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• pp.189-202
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• 2010

Although e-Finance has become more and more prevalent in everyday life, with the development of information technology, further development of e-Finance and commercial transactions has been limited. Therefore it is important for financial institutions to be aware of the significance of e-Finance risk and take appropriate actions. And an effective risk management function relies on a well-defined organization structure to eliminate gaps and minimize overlaps in risk management duties, responsibilities, and authorities. It defines and assigns risk management responsibilities, authorities, and accountabilities to appropriate personnel. The adequate organization of the risk management function is very important in the success of risk management.

• 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.

• Review of KIISC
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• v.27 no.2
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• pp.34-40
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• 2017

제어시스템(발전시설, 전력시설, 교통시설 등)은 생산성, 가용성, 안전성을 목적으로 다양한 제어기기들로 구성되며, 물리적으로 다양한 위치에 분산되어 운영되고 있다. 그리고 안전성과 가용성을 유지하기 위해 시스템 도입 시 기존 시스템에 영향을 미치지 않는지 검증을 수행 후 시스템을 도입한다. 이러한 이유로 신규 기술의 도입이나, 기기의 변경이 자유롭지 않다. 이와 같은 제어시스템의 특성으로 인해 현재 증가되고 있는 제어시스템 사이버공격에 대한 보안대책 또는 기술들의 적용이 쉽지 않아 사이버공격에 취약한 상황이다. 제어시스템은 상위 시스템의 제어 명령을 통해 하위 제어기기 또는 필드기기를 제어하는 형태로 제어 명령의 무결성 유지가 특히 중요하다. 이는 곧 제어시스템에 환경에 접근한 공격자가 인가되지 않은 장비를 제어시스템에 연결하고, 악성 제어명령을 전송하게 된다면 제어기기는 이를 인지하지 못하고 정지되거나 오작동을 유발 할 수 있다는 것을 의미한다. 본 논문에서는 제어시스템 내 제어명령의 무결성 유지를 위해 임베디드 Add-on 단말을 통해 OTP 값을 생성, 전달, 검증하는 방안을 제안한다. 해당 방안은 상위노드와 하위노드 사이에 Add-on 장치를 두어 상위노드에서 제어명령 발생 시, 제어명령에 OTP값을 통해 캡슐화하고 하위노드로 전달한다. Add-on 장비는 일반 IT시스템과 상이한 제어시스템의 특성에 맞게 고안되었으며 제어시스템 내에 발생되는 제어명령 위변조, 제어명령 재사용 공격 등을 차단 할 수 있다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.2
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• pp.357-364
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• 2015

Tags and Readers is receiving and sending the data using the wireless communication in the RFID environment. Therefore, it could allow an attacker to participate in the network without the physical constraints, which can be easily exposed to a variety of attacks, such as taps and data forgery. Also, it is not easy to apply the security techniques to defend external attacks because the resource constraints of RFID tags is high. In this paper, new tag-reader mutual authentication protocol is proposed to protect the external cyber attacks such as spoofing attacks, replay attacks, traffic analysis attacks, location tracking attacks. The performance evaluation of the proposed mutual authentication protocol is performed and the simulation results are presented.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.7
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• pp.1453-1458
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• 2009

Sensor network for the human approach in a difficult area and a wide range of surveillance and the boundaries for the purpose and mission is the utilization significantly. In this paper we searched important nodes from the surveillance reconnaissance sensor network based on the virtual data. we generated data within the sensor's measurement range in the data transmitted from sensor nodes, and used PCA(Principle Component Analysis) for searching key node. If the important sensor node searched, and we can have easy management and establishing security measures when security problems is happened about nodes. This is for the sensor network in terms of effectiveness and cost-effectively and is directly connected with life span.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.460-463
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• 2014

클라우드 컴퓨팅의 많은 장점에도 불구하고 클라우드 컴퓨팅은 보안이슈는 줄어들지 않으며, 특히 디지털 포렌식은 실질적인 기능을 수행하기에 미비한 실정이다. 최근, 다양한 사이버 범죄가 증가하면서 클라우드 컴퓨팅 환경은 사이버 범죄에 노출되어 있으며 악의적인 공격의 위험을 가지고 있다. 클라우드 포렌식은 자원이 가상공간에 존재할 수 있고, 증거 데이터가 물리적으로 분산되어 있기 때문에 기존의 포렌식 수사와는 다르게 접근해야 한다. 또한, 클라우드 기반 포렌식에서 획득 가능한 증거 데이터에 대한 정의가 되어 있지 않아서 증거 데이터를 수집하는데 어려움을 겪는다. 이에 본 논문에서는 오픈스택 플랫폼을 이용한 클라우드 환경을 구축하고, 클라우드 플랫폼 기반 포렌식을 위해 획득 가능한 로그 데이터에 대해 정리하고, 실제 획득 가능한 로그를 수집 및 분석하고, 클라우드 컴퓨팅 플랫폼기반 포렌식의 한계점과 해결방안을 알아본다.

• Journal of the Institute of Electronics and Information Engineers
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• v.52 no.4
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• pp.125-132
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• 2015

PCI Express is high-speed point-to-point serial protocol, the system is designed by analysing loss and jitter through Eye Diagram. It is necessarily analyzing high speed serial signals when the PCI Express Gen3 which has 8Gbps physical signal speed is designed especially. This paper deals with topology extraction, channel analysis, extraction of s-parameters and system signal integrity simulation within transceiver buffer models through PCI Express Gen3 server connecting switch system design. Optimal parameters of transmitter buffer equalizer are found through solution space simulation of de-emphasis and preshoot parameters to compensate channel loss.

• KIPS Transactions on Computer and Communication Systems
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• v.8 no.1
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• pp.9-16
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• 2019

Smartphones are becoming a portable computer. As a result, even the most sensitive financial application services are now available anywhere on the smartphone. Compared to general PCs, smartphones communicate with external devices through various channels such as wireless internet, mobile communication network, Bluetooth, and NFC, and a wide variety of applications are provided. Therefore, if vulnerabilities exist, the possibility of attack damage increases. In this paper, we analyze the vulnerabilities of dynamic virtual keyboards used in login of banking apps of smartphones with various physical constraints and propose countermeasures.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.17 no.5
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• pp.141-146
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• 2007

Barcodes have been widely used to implement automatic identification systems but there are various problems such as security weakness or distance restriction in scanning barcode signals in a barcode-based automatic identifcation systems. Recently researchers are gradually interested in radio frequency identification (RFID) and RFID systems have been applied to various fields than before. Especially one of RFID application fields, a bank system uses RFID tagged bankontes to prevent illegal transactions such as counterfeiting banknotes and money laundering. In this paper, we propose a RFID system for protecting location provacy of a banknote holder. In addition, our paper describes that a trust party can trace a counterfeit banknote holder to provide against emergencies.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.12 no.2
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• pp.101-110
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• 2002

The purpose of this research is to establish Korean standards of best practice and common criteria for testing and evaluating the performance of biometric recognition systems. First of all, research activities in leading countries such as USA, Great Britain and Germany have been studied and analyzed. Then, the standards of best practice and common criteria are proposed in the aspects of sensors, algorithms, and application systems. The results of this work will be utilized fur test and evaluation of commercial biometric products by KISA and provided to private industries for their own evaluation of products.