• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.711-714
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• 2013

구글의 안드로이드 플랫폼은 오픈 소스의 특성으로 인해 스마트 폰 제조사와 통신 사업자, 일반 사용자들의 많은 관심을 받고 있으며 2013년 2분기에는 전 세계 스마트 폰 시장에서 점유율 79.3%라는 결과를 얻게 되었다. 하지만 안드로이드의 높은 점유율만큼 안드로이드 플랫폼에 대한 공격들 또한 많아지고 있다. 이러한 공격들로부터 안드로이드 플랫폼의 보안성을 향상시키기 위해 많은 보안 기능들이 안드로이드에 탑재되고 개선되고 있지만, 보안 기능이 개선되는 만큼 새로운 보안 취약성들도 발견되고 있다. 본 연구에서는 안드로이드에서 제공하는 응용 프로그램 권한 기법에 대한 보안 취약성을 분석하고 그에 대한 향상된 보안 대책을 제안한다.

• Review of KIISC
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• v.23 no.4
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• pp.82-93
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• 2013

최근 새로운 지불결제 플랫폼인 스마트폰의 등장으로 모바일 금융 결제 비중이 지속적으로 증가하고 있다. 특히 금융microSD는 기존에 사용해오던 USIM의 불편함을 해소하고 보안성을 강화하여, 새로운 모바일 지불결제 수단으로써 IT업계와 금융업계의 지대한 관심을 받고 있다. 이에 금융microSD를 통해 모바일 지불결제가 또 다른 제2의 서비스로 융합하는 단초가 될 것으로 기대하고 있다. 본고에서는 모바일 지급결제 시장 현황 및 서비스 동향과 모바일 지급결제 서비스의 핵심 플랫폼으로 기능하는 Secure Elements(SE)를 유형별로 나누어 살펴보고, 금융 microSD 프레임워크를 분석하여 보안사항 및 활용방안 등에 대해 기술하고자 한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.05a
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• pp.414-417
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• 2011

2011년 현재 유무선 인터넷을 이용해 VoIP, e-mail 통신을 하며, 금융거래인 은행거래, 주식거래, 안전결제 서비스를 이용하고 있다. 하지만 유무선 인터넷에서 침해사고가 발생하여 VoIP, e-mail이나 은행거래, 주식거래, 안전결제에 취약점 가능성이 있다. 2011년 3월 개인정보보호법 국회통과로 금융거래에서 개인정보를 보호해야 한다. 본 논문에서는 WiBro 인터넷 금융거래에서 VoIP, e-mail이나 은행거래, 주식거래, 안전결제를 할 때, SecuiScan을 이용하여 취약점을 분석한다. 취약점을 분석한 결과, 발견된 취약점을 이용하여 실험실 환경에서 해킹공격을 실시한다. 해킹결과 분석과 침해사고 유형에 따른 보안성 강화를 위한 보안 대책을 제시한다. 본 논문의 연구는 WiBro 인터넷 금융거래 보안성 강화에 기여할 것이다.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.706-709
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• 2011

모바일 네트워크 고도화 및 네트워크와 단말기의 비약적인 발전으로 모바일 기기의 보급이 확산되고, 시장의 경쟁 본격화에 따른 개방형 플랫폼 증가와 애플리케이션 및 모바일 웹의 활성화가 이뤄지고 있다. 또한 모바일 환경에서의 개발이 표준화 되어가면서 제작 및 배포가 용이해지고 있다. 이러한 환경적인 영향으로 모바일 웹 및 어플리케이션에 대한 보안 위협은 더욱 가중되고 있으며 공격의 규모 및 피해가 증가될 것으로 예상된다. 본 논문에서는 이러한 모바일 환경에서 인증 보안을 강화하기 위해 인증 서비스에 위치정보를 활용하는 방안을 제안하고 개인별로 특화된 인증에 관련된 LBS(Location-Based Service)를 제공할 수 있는 시스템을 구현한다. 이 시스템의 구현을 통해 사용자 위치에 따라 인증 유효성 여부를 체크함으로써 현재의 인증시스템에서 신뢰성과 유효성을 추가적으로 확보 할 수 있음을 증명하고 구체적인 활용 방안을 제안한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.4
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• pp.775-783
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• 2017

As interest in cloud computing grows, the number of users using cloud computing services is increasing. However, cloud computing technology has been steadily challenged by security concerns. Therefore, various security breaches are springing up to enhance the system security for cloud services users. In particular, research on detection of malicious VM (Virtual Machine) is actively underway through the introspecting virtual machines on the cloud platform. However, memory analysis technology is not used as a monitoring tool in the environments where multiple virtual machines are run on a single server platform due to obstructive monitoring overhead. As a remedy to the challenging issue, we proposes a computationally efficient instance memory introspection scheme to minimize the overhead that occurs in memory dump and monitor it through a partial memory monitoring based on the well-defined kernel memory map library.

• The Journal of the Korea Contents Association
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• v.10 no.1
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• pp.46-58
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• 2010

The user valence of VoIP services with SIP protocol is increasing rapidly because of cheap communication cost and its conveniency. But attacker can easily modify the packet contents of SIP protocol as SIP header is transmitted by using UDP methods in text form. The reason is that SIP protocols does not provide an authentication function on the transmission session. Therefore, existing SIP protocol is very weak on SIP Packet Flooding attack etc. In order to solve like this kinds of SIP vulnerabilities, we used SIP status codes under the monitoring module for detecting SIP Flooding attacks and additionally proposed an advanced protocol where the authentication and security function is strengthened about SIP packet. We managed SIP session spontaneously in order to strengthen security with SIP authentication function and to solve the vulnerability of SIP protocol. The proposed mechanism can securely send SIP packet to solves the security vulnerability with minimum traffic transmission. Also service delay in SIP proxy servers will be minimized to solve the overload problem on SIP proxy server.

• Journal of Korea Port Economic Association
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• v.30 no.1
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• pp.97-118
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• 2014

Recent accidents of customer information leakage increase the necessity of information security for organization and the importance of information security team for it. To strengthen information security, organizations make information security policy and ask the members to comply with it. In this regard, maritime organization also needs to structure information security policy and examine its ability and behavior. The purpose of this study is to analyze the effects of compliance with information security policy on the ability and behavior of workers in shipping and port organization. The results of investigation show that information security education and norm affect compliance with information security of the workers. On the contrary, the punishment of information security is insignificant. It is shown that the degree of compliance with information security significantly affects its ability and behavior of the workers in shipping and port organization.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38C no.11
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• pp.966-971
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• 2013

This paper introduces development of a Military Entrance Control System using the developed military insignia UHF RFID tags. Generally, in the military entrance control system, the security identification (ID) card with HF RFID tag can be used, to increase the security level, the developed insignia UHF RFID tags are used in the enforced military entrance control system. The general metal insignias, have been worn on a hat or on the shoulder pads of a military uniforms, are simulated and developed as UHF RFID insignia tags. The military entrance control system can manage the name, rank, address (information of military personnel), time and date of entrance and the history of entrance of the security area.

• Convergence Security Journal
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• v.17 no.3
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• pp.115-124
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• 2017

The purpose of this study is to provide measures for National Assembly safety and control safety issues arise from increased National Assembly public tour services. First, the study provided the definition of National Assembly public tour and types of tour services, tour procedures, and visitor guidelines. Next, risk factors for National Assembly were discussed and environmental security of national major facilities were compared. Furthermore, four measures for strengthening safety for National Assembly were discussed. First, it is important to utilize special security guards in National Assembly since they can use special weapons unlike general security guards. Second, special guards can be flexibly utilized compared to general security guards. Third, based on the Private Security Law, there is no legal issues for utilizing special security guards since National Assembly is categorized as national major facilities. Fourth, educational programs for security guards are focused on National Assembly safety, brief education, martial arts, customer satisfaction, more specialized educational program for public tour programs should be provided.

• Convergence Security Journal
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• v.18 no.2
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• pp.33-40
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• 2018

ICT technology has been applied to various educational fields, but applying to educational test field is limited. Computer-based test (CBT) can overcome temporal and spatial constraints of conventional paper-based test, but is vulnerable to fraud by test parties. In this paper, we propose real-time monitoring and process management methods to enhance the security of CBT. In the proposed methods, the test screens of students are periodically captured and transferred to the professor screen to enable real-time monitoring, and the possible processes used for cheating can be blocked before testing. In order to monitor the screen of many students in real time, effective compression of the captured original image is important. We applied three-step compression methods: initial image compression, resolution reduction, and re-compression. Through this, the original image of about 6MB was converted into the storage image of about 3.8KB. We use the process extraction and management functions of Windows API to block the processes that may be used for cheating. The CBT system of this paper with the new security enhancement methods shows the superiority through comparison of the security related functions with the existing CBT systems.