• Proceedings of the Korea Information Processing Society Conference
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• 2003.11b
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• pp.1301-1304
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• 2003

최근 무선 환경에서의 이동 노드들간의 라우팅을 지원하는 이동 Ad-Hoc 네트워크에 대한 연구가 활발히 이루어지고 있다. 이동 Ad-hoc 네트워크는 기반 시설이 존재하지 않거나 설치가 용이하지 않은 지역에서 고정된 기반망의 도움없이 이동 노드들간에 자율적으로 구성되는 망이다. 본 논문에서는 이동 Ad-Hoc 네트워크의 기술현황을 살펴보고 현재 논의되고 있는 주요 기술 이슈에 대해 알아보았다. 특히 Ad-Hoc 네트워크는 무선의 특성상 보안에 취약하므로, 보안성을 지원하기 위한 기술들을 중점으로 살펴보았다. Ad-Hoc 네트워크의 보안 기술로는 ARAN, SAR, Ariadne, SEAD 등이 있다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.7
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• pp.4884-4890
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• 2015

These days most of people possesses an average of one to two mobile devices in the world and a wireless network market is gradually expanding. Wi-Fi preference are increasing in accordance with the use growth of mobile devices. A number of areas such as public agencies, health care, education, learning, and content, manufacturing, retail create new values based on Wi-Fi, and the global network is built and provides complex services. However, There exist some attacks and vulnerabilities like wireless radio device identifier vulnerability, illegal use of network resources through the MAC forgery, wireless authentication key cracking, unauthorized AP / devices attack in the next generation radio network environment. In addition, advanced security technology research, such as authentication Advancement and high-speed secure connection is not nearly progress. Therefore, this paper designed a secure communication system for message protection in next-generation wireless network environments by device identification and, designing content classification and storage protocols. The proposed protocol analyzed safeties with respect to the occurring vulnerability and the securities by comparing and analyzing the existing password techniques in the existing wireless network environment. It is slower 0.72 times than existing cypher system, WPA2-PSK, but enforces the stability in security side.

• Proceedings of the Korean Society of Computer Information Conference
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• 2015.01a
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• pp.77-80
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• 2015

무선통신을 기반으로 하는 WSN은 통신의 특성상 네트워크보안에 취약점을 가진다. 무선통신의 취약점은 누구나 네트워크에 접근이 가능하다는 것이다. 이에 따라 침입에 강인한 무선 센서 네트워크인 INtrusion-tolerant routing protocol for wireless SEnsor NetworkS(INSENS)가 제안됨으로써 WSN의 초기 라우팅 설정 시 침입하는 공격자를 사전에 차단할 수 있게 되었다. 그러나 라우팅 설정 후에 노드가 공격자에 의해 훼손당하게 된다면, 노드의 주요정보를 이용해 공격자는 또다시 라우팅 공격이 가능해진다. 본 논문에서는 공격자에 의해 훼손된 노드가 라우팅 공격 중 대표적인 공격인 싱크홀 공격 메시지를 방송하였을 때, 페어와이즈 키를 통해 효과적으로 공격메시지를 차단하는 양방향인증기법을 제안한다. 이로써 INSENS에서 발생하는 싱크홀 공격을 차단함으로써 WSN의 보안 강화에 기여한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.01a
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• pp.41-42
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• 2017

무선 센서 네트워크에서 센서 노드의 취약점으로 인해 공격자는 쉽게 훼손된 노드를 만들어 센서 네트워크를 공격한다. DoS 공격에 해당하는 플로딩 공격은 노드의 에너지 손실과 경로 상의 노드의 에너지를 전부 소비시켜 네트워크 수명이 단축된다. 본 논문에서 제안 기법은 노드의 에너지가 적은 지역에서 다중경로 라우팅을 적용해 각 노드의 부하를 줄이고 네트워크 수명을 증가시키는 보안기법을 제안한다.

• Convergence Security Journal
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• v.13 no.4
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• pp.101-108
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• 2013

Sensor network configurations are for a specific situation or environment sensors capable of sensing, processing the collected information processors, and as a device is transmitting or receiving data. It is presently serious that sensor networks provide many benefits, but can not solve the wireless network security vulnerabilities, the risk of exposure to a variety of state information. u-Healthcare sensor networks, the smaller the sensor node power consumption, and computing power, memory, etc. restrictions imposing, wireless sensing through the kind of features that deliver value, so it ispossible that eavesdropping, denial of service, attack, routing path. In this paper, with a focus on sensing of the environment u-Healthcare system wireless security vulnerabilities factors u-Healthcare security framework to diagnose and design methods are presented. Sensor network technologies take measures for security vulnerabilities, but without the development of technology, if technology is not being utilized properly it will be an element of threat. Studies suggest that the u-Healthcare System in a variety of security risks measures user protection in the field of health information will be used as an important guide.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.05a
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• pp.241-244
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• 2013

These days wireless network devices (smartphones, tablet PC, laptop) are being utilized more frequently. In line with the increasing number of users of a wireless network, the usage of wireless access points is also increasing. Nowadays as nationwide wireless network services being made available, wireless networks are increasingly being used due to the lower costs of building faster and affordable private or carrier networks. However wireless security is not keeping up with this development. Many use open networks where anyone can join, meanwhile for those using wireless security protocols there is the problem of managing the password. In this paper, we analyze the problems of trying to build a user authentication system using an access point and the RADIUS server.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.04a
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• pp.81-84
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• 2001

PC 환경이 아닌 무선 인터넷 환경에서 제공되는 Mobile GIS(Geographic Information System)는 시간과 공간의 제약을 극복하고 실시간으로 지리정보를 얻을 수 있는 장점을 가지고 있으나, 사용자의 무선단말기와 서버 사이에 접속이 유지되어 있어야만 무선으로 GIS 서비스를 이용할 수 있다. 이는 현재 국내 무선 네트워크의 느린 속도와 비싼 이용 요금을 감안하면 Mobile GIS 가 대중화되는데 장애요인이 되고있다. 그리고 무선 인터넷 서비스가 급격히 증가하면서 Mobile GIS는 보안상 약점을 드러낼 것으로 예측된다. 그러므로 본 논문에서는 공개된 불특정다수의 무선 네트워크 환경에서 발생할 수 있는 보안의 피해와 그에 따른 기본적 Mobile Security 서비스에 대해 알아보고, 정보보호 입장에서 Mobile Database 를 연구하였다. 또한 Mobile GIS 를 위한 WAP 게이트웨이에서 공간데이터의 유출 가능성을 발견하였고, 이를 위한 해결책으로 J2ME 의 Pre-verification 기능과 종단간 암호화 (End-to-End Security) 기능을 Mobile GIS 설계에 적용하여 무선 환경에서 동적인 지도서비스와 더불어 공간 데이터의 보안을 유지할 수 있는 기법을 제시하였다. 이 연구를 통해 대역폭(Bandwidth)의 한계를 지닌 개방적 무선환경에서 Mobile GIS와 같은 컨텐츠 프라이버시(Contents Privacy) 보호가 요구되는 분야에 응용될 수 있으리라 기대된다.

• Journal of Broadcast Engineering
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• v.13 no.2
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• pp.261-273
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• 2008

Multimedia service whose use is rapidly increasing supports effective services to convert and transmit multimedia data based on network speed, noise circumstance, terminal computation, and type of contents for satisfying QoS. For supporting information protection of multimedia service, it offers middle level of singular security service or security mechanism which is based on policy of service provider, depending on present terminal computation and type of contents. It can support security mechanism for more effective multimedia service, if we study security of application layer and network layer for supporting multimedia service. In this paper, we propose Multimedia security framework reflected on quantitative analysis of the WLAN(Wireless Local Area Network) mesh network security using the utility function in the level of the sorority, violation and addictive compensation model.

• Convergence Security Journal
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• v.9 no.2
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• pp.71-78
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• 2009

It is very difficult to apply previous security protocols to WSNs(Wireless Sensor Networks) directly because WNSs have resource constrained characteristics such as a low computing ability, power, and a low communication band width. In order to overcome the problem, we proposes a secure group communication scheme applicable to WSNs. The proposed scheme is a combined form of the TEEN(Threshold sensitive Energy Efficient sensor Network protocol) clustering based hierarchical routing protocol and security mechanism, and we assume that WSNs are composed of sensor nodes, cluster headers, and base stations. We use both private key and public key cryptographic algorithms to achieve an enhanced security and an efficient key management. In addition, communications among sensor nodes, cluster headers, and base stations are accomplished by a hierarchical tree architecture to reduce power consumption. Therefore, the proposed scheme in this paper is well suited for WSNs since our design can provide not only a more enhanced security but also a lower power consumption in communications.

• Journal of Digital Convergence
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• v.14 no.10
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• pp.287-293
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• 2016

Wireless sensor networks (WSNs) have many applications and are deployed in a wide variety of areas. They are often deployed in potentially adverse or even hostile environment so that there are concerns on security issues in these WSNs. Recently, an anonymous user authentication and key agreement scheme (AUAKAS) was proposed based on symmetric cryptosystem in WSNs. It is claimed in AUAKAS that it assures security against different types of attacks including impersonation attacks. However, this paper shows that AUAKAS does not cope from user impersonation attack and gateway impersonation attack from the legally registered user on the gateway. The security analysis could guide the required features of the security scheme to be satisfied.