• Title/Summary/Keyword: Global Eavesdropping

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Generation of Dummy Messages Depending Upon the Location Privacy Level in Sensor Networks (센서 네트워크에서 위치 기밀 수준에 따른 더미 메시지 생성)

  • Tscha, Yeong-Hwan
    • The Journal of the Korea institute of electronic communication sciences
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    • v.11 no.9
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    • pp.861-868
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    • 2016
  • Dummy messages are usually generated for faking in preserving the location privacy of a sink or source against the global eavesdropping in wireless networks. In this paper, we propose a new method in which a certain number of nodes determined by considering the required privacy level are made to transit to the dormant state doing nothing so that the total number of dummy messages is reduced, while the paths from the sink to the sources are ensured. Through simulation we verify the success ratio of path establishments between the sink and a set of sources and the location privacy level of them.

Concealing Communication Paths in Wireless Sensor Networks (무선 센서 네트워크에서의 통신 경로 은닉)

  • Tscha, Yeong-Hwan
    • The Journal of the Korea institute of electronic communication sciences
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    • v.9 no.12
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    • pp.1353-1358
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    • 2014
  • Tremendous amount of dummy packets are generally generated for faking over a wireless sensor network so as to keep the location privacy of nodes on the communication paths against the global eavesdropping. In this paper, a scoped-flooding protocol is designed for transferring data between each source and mobile sink(aka, basestation) where, the only nodes within the scope are allowed to issue dummy packets at every idle time so that the location privacy of the nodes on the paths is kept and the amount of dummy packets is reduced to the extend of the flooding scope. The size of the flooding diameter can be taken into consideration of the privacy level and the communication cost. We design a detailed specification of the protocol and verify several properties.

Concealing Communication Source and Destination in Wireless Sensor Networks(Part I) : Protocol Design (무선 센서 네트워크에서의 통신 근원지 및 도착지 은닉(제1부) : 프로토콜 설계)

  • Tscha, Yeong-Hwan
    • The Journal of the Korea institute of electronic communication sciences
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    • v.8 no.2
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    • pp.219-226
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    • 2013
  • Against the global eavesdropping in wireless sensor networks, tremendous amount of dummy packets for faking are likely to be continuously generated in order to keep the location privacy of the communication source and destination. In our approach only certain disk-shaped zones of encompassing sources and destination are allowed to issue dummy packets during the data transfer so that the amount of generated packets is reduced while the location privacy of the source and destination remains secret. To this end we design a routing protocol and propose a detailed formal specification of it, and verify major characteristics.

Concealing Communication Source and Destination in Wireless Sensor Networks (Part I) : Protocol Evaluation (무선 센서 네트워크에서의 통신 근원지 및 도착지 은닉(제2부) : 프로토콜 평가)

  • Tscha, Yeong-Hwan
    • The Journal of the Korea institute of electronic communication sciences
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    • v.8 no.3
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    • pp.379-387
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    • 2013
  • In large-scale wireless sensor networks, tremendous amount of dummy packets is usually accompanied by keeping location privacy of the communication source and destination against global eavesdropping. In our earlier work we designed a location privacy routing protocol, ELPR(End-node Location Privacy Routing) in which the generation of dummy packets at each idle time-slot while transferring data packets are restricted to only the nodes within certain areas of encompassing the source and destination, respectively. In this paper, it is given that ELPR provides various degrees of location privacy while PCM(Periodic Collection Method) allows the only fixed level. Simulation results show that as the number of nodes or data packets increases ELPR permits in terms of the number of generated packets more cost-effective location privacy than PCM.

Practical Schemes for Tunable Secure Network Coding

  • Liu, Guangjun
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.9 no.3
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    • pp.1193-1209
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    • 2015
  • Network coding is promising to maximize network throughput and improve the resilience to random network failures in various networking systems. In this paper, the problem of providing efficient confidentiality for practical network coding system against a global eavesdropper (with full eavesdropping capabilities to the network) is considered. By exploiting a novel combination between the construction technique of systematic Maximum Distance Separable (MDS) erasure coding and traditional cryptographic approach, two efficient schemes are proposed that can achieve the maximum possible rate and minimum encryption overhead respectively on top of any communication network or underlying linear network code. Every generation is first subjected to an encoding by a particular matrix generated by two (or three) Vandermonde matrices, and then parts of coded vectors (or secret symbols) are encrypted before transmitting. The proposed schemes are characterized by tunable and measurable degrees of security and also shown to be of low overhead in computation and bandwidth.

A Security Design for a Smart Power Grid Field Test based-on Power IT Systems (전력 IT 기반스마트 파워그리드 실증 보안 체계 설계)

  • Lee, Myung-Hoon;Bae, Si-Hwa;Son, Sung-Yong
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.14 no.11
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    • pp.2497-2506
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    • 2010
  • Smart power grid is targeting to improve grid operation by integrating existing power IT technologies in the jeju smart grid field test. Real-time two-way communication and interoperability in power grid are essential to smart power grid. Adopting smart grid will increase security vulnerabilities in power grid by increasing the number of wireless sensors and the chances of the external exposure of communication networks. In addition, hackers can cause chaos in the power grid system with eavesdropping and forgery attacks in communication networks. Smart power grid is one of the most important systems in deploying smart grid, and it is important to design security system systematically since smart grid can be seriously damaged when problem occurs. In this paper, local and global smart grid security standard and security vulnerabilities in power grid are reviewed, and 2 level smart grid service model is proposed.