• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권4호
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• pp.805-821
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• 2011

Wireless Sensor Networks (WSNs) are rapidly emerging because of their potential applications available in military and civilian environments. Due to unattended and hostile deployment environments, shared wireless links, and inherent resource constraints, providing high level security services is challenging in WSNs. In this paper, we revisit various security attack models and analyze them by using a well-known standard notation, Unified Modeling Language (UML). We provide a set of UML collaboration diagram and sequence diagrams of attack models witnessed in different network layers: physical, data/link, network, and transport. The proposed UML-based analysis not only can facilitate understanding of attack strategies, but can also provide a deep insight into designing/developing countermeasures in WSNs.

• Journal of information and communication convergence engineering
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• 제9권5호
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• pp.562-566
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• 2011

As telecommunication technologies in telemedicine services are developed, the expeditious development of wireless and mobile networks has stimulated wide applications of mobile electronic healthcare systems. However, security is an essential system requirement since many patients have privacy concerns when it comes to releasing their personal information over the open wireless channels. Due to the invisible feature of mobile signals, hackers have easier access to hospital networks than wired network systems. This may result in several security incidents unless security protocols are well prepared. In this paper, we analyzed authentication and authorization procedures for healthcare system architecture to apply secure M-health systems in the hospital environment. From the analyses, we estimate optimal requirements as a countermeasure to its vulnerabilities.

• 정보보호학회논문지
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• 제23권6호
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• pp.1191-1197
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• 2013

대규모의 센서 네트워크에서는 고정된 베이스 스테이션에서 데이터를 수집하고 네트워크를 관리하는 것은 센서노드들의 제한된 에너지를 빨리 소진시켜 네트워크의 수명을 단축시키게 되므로 바람직하지 않다. 다른 여러 가지 이유로도 모바일 싱크가 널리 활용되고 있으나, 이러한 모바일 싱크에 대한 안전한 쿼리 프로토콜에 대한 연구는 그다지 많지는 않다. 본 논문에서는 모바일 싱크가 인접 센서노드들과 안전하면서도 효율적인 쿼리 세션을 수행할 수 있는 키관리 및 인증 프로토콜을 제안하고 안전성 및 효율성을 분석한다.

• 대한전기학회논문지:전력기술부문A
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• 제49권6호
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• pp.253-258
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• 2000

This paper presents an application of Kohonen neural networks to assess the dynamic security of power systems. The dynamic security assessment(DSA) is an important factor in power system operation, but conventional techniques have not achieved the desired speed and accuracy. The critical clearing time(CCT) is an attribute which provides significant information about the quality of the post-fault system behaviour. The function of Kohonen networks is a mapping of the pre-fault system conditions into the neurons based on the CCTs. The power flow on each line is used as the input data, and an activated output neuron has information of the CCT of each contingency. The trajectory of the activated neurons during load changes can be used in on-line DSA efficiently. The applicability of the proposed method is demonstrated using a 9-bus example.

• International Journal of Computer Science & Network Security
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• 제24권8호
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• pp.139-144
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• 2024

VANETs have become one of the most attractive research areas in the world of wireless networks in recent years. Indeed, vehicular networks have become capable of optimizing road traffic, which significantly reduces the number of accidents through notifications exchanged between nearby vehicles. The routing function based on the opportunistic algorithm is a critical part of the vehicle's communication system and will therefore be an ideal target for attacks that could aim to prevent alert messages from reaching their destination, and thus endanger human lives. The black hole attack is a major threat to the security of VANETs. The main idea of this paper focuses on the analysis of this type of attack in VANETs using Discrete-Time Markov Chains (DTMC). and deduce at the end the effect of the number of malicious nodes on the delivery rate in the network.

• Journal of Communications and Networks
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• 제14권3호
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• pp.310-318
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• 2012

Detecting intrusion attacks accurately and rapidly in wireless networks is one of the most challenging security problems. Intrusion attacks of various types can be detected by the change in traffic flow that they induce. Wireless industrial networks based on the wireless networks for industrial automation-process automation (WIA-PA) standard use a superframe to schedule network communications. We propose an intrusion detection system for WIA-PA networks. After modeling and analyzing traffic flow data by time-sequence techniques, we propose a data traffic prediction model based on autoregressive moving average (ARMA) using the time series data. The model can quickly and precisely predict network traffic. We initialized the model with data traffic measurements taken by a 16-channel analyzer. Test results show that our scheme can effectively detect intrusion attacks, improve the overall network performance, and prolong the network lifetime.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권6호
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• pp.2841-2860
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• 2018

Vehicular networks play an important role in current intelligent transportation networks and have gained much attention from academia and industry. Vehicular networks can be enhanced by Long Term Evolution-Vehicle (LTE-V) technology, which has been defined in a series of standards by the 3rd Generation Partnership Project (3GPP). LTE-V technology is a systematic and integrated V2X solution. To guarantee secure LTE-V communication, security and privacy issues must be addressed before the network is deployed. The present study aims to improve the security functionality of vehicular LTE networks by proposing an efficient and secure ID-based message authentication scheme for vehicular networks, named the ESMAV. We demonstrate its ability to simultaneously support both mutual authentication and privacy protection. In addition, the ESMAV exhibit better performance in terms of overhead computation, communication cost, and security functions, which includes privacy preservation and non-frameability.

• 융합보안논문지
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• 제7권4호
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• pp.51-60
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• 2007

현재 다양한 공격 대응을 위해 효과적이고 효율적인 방법으로 네트워크와 정보시스템의 취약성을 평가하는 일은 매우 중요하게 여겨지고 있다. 그러나 네트워크와 정보시스템의 취약성 및 위험 평가 방법론은 센서 네트워크에 직접 적용하기가 어렵다. 왜냐하면 센서 네트워크는 전통적인 네트워크와 정보시스템과 비교해 다른 특성을 지니고 있기 때문이다. 본 연구 논문은 클러스터 기반 센서 네트워크에서의 취약성 평가 프레임워크를 제안하고 있다. 센서 네트워크에서 취약성을 평가하며 몇 가지 케이스를 통해 클러스터 기반 센서 네트워크의 취약성 평가 프레임워크의 실효성을 증명해 보인다.

• 한국산학기술학회논문지
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• 제12권11호
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• pp.5238-5244
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• 2011

최근 무선센서네트워크 분야는 군사, 생체, 건강관련 광범위한 응용분야에서 많은 주목을 받아 왔다. 대부분의 센서네트워크가 높은 보안성을 요구하는 임무의 기능을 수행한다. 외부로부터의 공격에 대한 네트워크 보안, 효율적인 암호화 시스템, 보안 키 관리 및 인증 부분에서 많은 연구가 이루어져 왔지만, 내부 위협으로부터 네트워크를 보호에 관한 연구는 미비하다. 본 논문에서는 센서네트워크에서의 모든 패킷을 관찰하는 탐지노드를 활성화하는 노드 선택방법을 제안하였다. 제안된 방법은 최적화식으로 모델링되었으며, 접근방법의 검정을 위하여 경험적 Greedy 알고리즘 기반의 시뮬레이션 결과를 나타내었다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.288-289
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• 2013

An integrated security mechanism is one of the key challenges in the open wireless network architecture because of the diversity of the wireless network in open wireless network and the unique security mechanism used in each one of these networks. Optimized security protocols and mechanisms are employed for the high performance and security. Finally, a challenge in the near future will converge the integration of Open Ubiquitous Sensor Network (OUSN) with security protocols for applying the their applications. We analysed unique network-centric features and security mechanism of various heterogeneous wireless networks.