• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.834-837
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• 2011

AMI 시스템은 정보통신 기술과 전력망의 융합으로 탄생한 새로운 형태의 차세대 전력망인 스마트그리드의 핵심기술 중 하나이다. AMI 시스템의 부하 제어 및 수요 측정, 미터링, 과금 등을 위한 다양한 유 무선 통신기술(ZigBee, PLC, Binary CDMA 등)을 적용함에 있어 기존에 제시된 AMI 네트워크 보안 위협에 따른 취약점은 스마트그리드 전체 네트워크의 보안사고를 유발할 수 있다. 본 논문은 AMI 시스템 상에서 ZigBee, Binary CDMA와 같은 무선 네트워크의 적용으로 인한 보안특성을 분석하고 보안 요구사항에 대한 대응방안을 제시한다.

• 전자공학회논문지 IE
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• v.49 no.2
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• pp.58-64
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• 2012

In this paper, we proposed a distributed gateway for ubiquitous healthcare system. We also designed and implemented protocol conversion and processing algorithms to exchange a seamless information, the bio signals between the databases and the receiving devices from ZigBee to gateway and from the gateway to database and network. The distributed gateway system consists of the bio signal acquisition, ZigBee modules, distributed databases, and gateways. The bio signals detected by the ZigBee module are sent to the gateway. The distributed gateway analyzes the data being transferred, sends those to the receiving devices, and lets the authorized personnel access. The proposed system can be utilized in various fields including activity analysis for the elderly, security systems, home network service, and so on.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.21 no.3
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• pp.27-35
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• 2011

Design of Sensor nodes in Wireless Sensor Network(WSN) should be considered some properties as electricity consumption, transmission speed, range, etc., and also be needed the protection against various attacks (e.g., eavesdropping, hacking, leakage of customer's secret data, and denial of services). The stream cipher Rabbit, selected for the final eSTREAM portfolio organized by EU ECRYPT and selected as algorithm in part of ISO/IEC 18033-4 Stream Ciphers on ISO Security Standardization recently, is a high speed stream cipher suitable for WSN. Since the stream cipher Rabbit was evaluated the complexity of side-channel analysis attack as 'Medium' in a theoretical approach, thus the method of power analysis attack to the stream cipher Rabbit and the verification of our method by practical experiments were described in this paper. We implemented the stream cipher Rabbit without countermeasures of power analysis attack on IEEE 802.15.4/ZigBee board with 8-bit RISC AVR microprocessor ATmega128L chip, and performed the experiments of power analysis based on difference of means and template using a Hamming weight model.

• Review of KIISC
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• v.16 no.6
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• pp.64-73
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• 2006

USN(Ubiquitous Sensor Network) 기술은 유비쿼터스 사회의 기반이 되는 중요한 기술 중의 하나로 USN 기술을 통해 산업 구조와 시장 구조에 전반적인 큰 변화를 가져올 것으로 예상된다. 본 고에서는 중요성 점증되고 있는 IP-USN 관련하여 표준화 현황으로서 IEEE 1451 워킹그룹, IEEE 802.15 워킹 그룹, ZigBee Alliance 및 IETF 6LoWPAN 워킹 그룹에서 추진 중인 내용에 대하여 고찰한다 또한 관련 기술 및 IP-USN에서 요구되어지는 보안기술에 대해서 고찰한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.6B
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• pp.970-976
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• 2010

Platform convergence originated from the convergence of broadcast and telecommunication is making rapid progress including IT and not-IT fields in order to provide a variety of converged services, S/W eco-system construction, and so on. With the advent of convergence environment, IEEE 802.15.4-based RF4CE technology is rising because of creating momentum for the market using converged connectivity between home and office devices as well as all around located devices. In this paper, we present enhanced RF4CE key seed distribution approach in order to provide efficient connection and control between devices. The proposed approach consists of device mutual authentication, initial vector assignment, and two-phase key seed distribution. Moreover, we make a development real RF4CE test board and its key agreement simulator to verify the proposed approach.

• Journal of the Korea Society of Computer and Information
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• v.27 no.12
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• pp.231-238
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• 2022

In this paper, among short-range wireless communication technologies such as Beacon, Bluetooth, UWB (Ultra-wideband), ZigBee, NFC (Near Field Communication), Z-Wave, 6LoWPAN (IPv6 over Low power WPAN), D2D (Device to Device), etc., proposed an IoT service platform based on a beacon that can provide indoor positioning. And, a beacon-linked web server was designed by blocking indiscriminate beacon spam signals and applying REST web service technology with flexibility and scalability. Data accessibility between different devices was verified by testing the success rate of data transmission, the success rate of blocking beacon push, the success rate of IoT interlocking processing, the accuracy of location positioning, and the success rate of REST web service-based data processing. Through the designed IoT service platform, various proposals and research on short-distance-based business models and service platforms will be conducted in the future.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.47 no.4
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• pp.63-72
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• 2010

This paper proposes a new authentication protocol for the LR-WPAN. In order to guarantee the reliability and safety of a protocol, this protocol uses the hierarchical authentication approach. In addition, in order to reduce the impact of the denial of service attack, the proposed protocol performs the authentication between a parent router and a joiner device prior to the authentication between a trust center and the joiner device. Moreover, this protocol reduces the authentication delay by decreasing the number of message exchanges during authentication procedure. This paper evaluates the safety of the proposed protocol by the security analysis and reliability of the proposed protocol by the GNY analysis. This paper also compares the number of message exchanges of the ZigBee authentication protocol and the proposed protocol when denial of service attack occurs to evaluate the resistance of the proposed protocol against the denial of service attack. We also analyze the delay for authentication of the joiner device through the implementation of both protocols. Those results show that the proposed protocol effectively protects networks from the denial of service attack and reduces the time for authenticating the joiner device up to maximum 30% as the number of hops increases.

• Smart Structures and Systems
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• v.17 no.5
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• pp.743-751
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• 2016

An ongoing research project is devoted to the design and implementation of a satellite based asset tracking for supporting emergency management in crisis operations. Due to the emergency environment, one has to rely on a low power consumption wireless communication. Therefore, the communication hardware and software must be designed to match requirements, which can only be foreseen at the level of more or less likely scenarios. The latter aspect suggests a deep use of a simulator (instead of a real network of sensors) to cover extreme situations. The former power consumption remark suggests the use of a minimal computer (Raspberry Pi) as data collector.

• Journal of Electrical Engineering and Technology
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• v.6 no.3
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• pp.418-422
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• 2011

For low-power sensor networks, a compact design of advanced encryption standard (AES) algorithm is needed. A very small AES core for ZigBee devices that accelerates computation in AES algorithms is proposed in this paper. The proposed AES core requires only one S-Box, which plays a major role in the optimization. It consumes less power than other block-wide and folded architectures because it uses fewer logic gates. The results show that the proposed design significantly decreases power dissipation; however, the resulting increased clock cycles for 128-bit block data processing are reasonable for IEEE 802.15.4 standard throughputs.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.793-796
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• 2016

정보통신 기술의 발달로 사물인터넷에 대한 관심이 증가하였다. 사물인터넷의 한 요소인 무선 큰거리 통신 기술에는 WIFi, 블루투스, ZigBee 등이 있다. 이러한 기술들 중 저전력 블루투스는 낮은 전력 소비와 범용성 덕분에 많은 각광을 밭고 있다. BLE(Bluetooth LE)의 한 형태인 비콘은 더욱 저전력이며, 패킷을 전달하는 방식 또한 기존의 블루투스와 차이가 있다. 본 논문에서논 컨텐츠 보안이 필요한 비콘 서비스의 예시로 비콘을 통한 새로운 형태의 음악 음반을 제시하였다. 또한, 그 보안 특성에 맞춰 패킷 이중화, RSSI, Serial Number Binding 등의 기술들을 사용한 보안 방법을 설계 및 구현한 보안 사레에 대하여 서술한다.