• The Transactions of The Korean Institute of Electrical Engineers
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• v.61 no.8
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• pp.1186-1192
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• 2012

In Jeju Smart Grid field test, Zigbee technology is being used as one of customer side solutions for AMI. Although Zigbee networks that provides effective connectivity and control among devices are advantages in ease of implementation and use, the data can be exposed to cyber attacks such as eavesdrop, unauthorized data dissemination and forgery. Currently authentication and confidentiality services are provided with the network and link keys generated based on public key pairs that are pre-installed in offline. However, the network is vulnerable once a hacker intrudes into a local network because operation and management policies for the generated keys are not well-established yet. In this paper, the vulnerability of the Zigbee security system in the customer side environment of Jeju Smart Grid field test is analyzed. Then, two-way authentication with the unique identifiers of devices and user-specific group management policies are proposed to resolve the vulnerability.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.2B
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• pp.184-194
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• 2011

Security is critically important for smart grid networks that are usually used for the electric power network and IT environments that are opened to attacks, such as, eavesdropping, replay attacks of abnormal messages, forgery of the messages to name a few. ZigBee has emerged as a strong contender for smart grid networks. ZigBee is used for low data rate and low power wireless network applications. To deploy smart grid networks, the collected information requires protection from an adversary over the network in many cases. The security mechanism should be provided for collecting the information over the network. However, the ZigBee protocol has some security weaknesses. In this paper, these weaknesses are discussed and a method to improve security aspect of the ZigBee protocol is presented along with a comparison of the message complexity of the proposed security protocol with that of the current ZigBee protocol.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2006.06a
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• pp.419-422
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• 2006

Zigbee 홈 센서네트워크에서의 보안은 최근 떠오르는 중요한 문제 중 하나이다. 네트워크에 침입하거나 기능을 마비시키기 위해 여러 가지 공격방법들이 사용되고 있으며, 기 중 정상 노드로의 DoS(Denial of Service)공격은 네트워크에서 사용 중인 주파수를 알고 있다면 쉽게 수행될 수 있고 그 후 무력화된 노드의 인증정보를 이용해서 더 큰 문제를 발생시킬 수 있다. 본 논문에서는 zigbee 노드에 대한 DoS 공격과 인증정보위조 공격을 효율적으로 탐지해 낼 수 있는 방식을 제안한다.

• Journal of Advanced Marine Engineering and Technology
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• v.38 no.4
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• pp.430-436
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• 2014

This paper relates to the study about the street security light management system. The purpose of the wireless remote management system is to manage street security lights efficiently. The system is composed of three components like light controller, CDMA gateway and web based remote management server. The zigbee solution is adopted to make local wireless network between street security lights. The CDMA network is used for the wireless communication between street security light controller and the remote control center. The gateway to interconnect zigbee network and CDMA was designed with low power 32 bits Cortex M3 micro-controller. For the data communication between the management server and the gateway, SMS and socket based TCP streaming is used. The management server sends SMS to the gateway to deliver light control and management requests, and the gateway replies with the light controllers report via TCP streaming. By using both SMS and TCP streaming communication, it was verified that simple cost effective management is possible for street security lights. We tried real test for 95 street security lights in real environment during two months and analyzed the practical possibility for mass supply.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2006.06a
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• pp.265-268
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• 2006

본 논문에서는 댁내망에서 무선 홈네트워크 기기 제어에 있어서의 트래픽 암호화 및 기기인증 등의 보안 문제 연구를 위한 플랫폼을 개발하였다. 우선 근거리 무선 통신 표준으로 자리잡고 있는 Zigbee를 적용한 도어락과 저가의 홈게이트웨이를 개발하고 다양한 암호 알고리즘을 탑재할 수 있도록 하였다. 또한 AES와 HGHT를 탑재하여 기기인증과 트래픽에 대한 암호화가 가능하도록 하였다.

• Journal of the Korea Society of Computer and Information
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• v.16 no.4
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• pp.101-110
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• 2011

A smart grid networks delivers electricity from suppliers to consumers using digital technology with two-way communications to control appliances at consumers' homes to save energy, reduce cost and increase reliability and transparency. Security is critically important for smart grid networks that are usually used for the electric power network and IT environments that are opened to attacks, such as, eavesdroping, replay attacks of abnormal messages, forgery of the messages to name a few. ZigBee has emerged as a strong contender for smart grid networks. ZigBee is used for low data rate and low power wireless network applications. To deploy smart grid networks, the collected information requires protection from an adversary over the network in many cases. The security mechanism should be provided for collecting the information over the network. However, the ZigBee protocol has some security weaknesses. In this paper, these weaknesses are discussed and a method to improve security aspect of the ZigBee protocol is presented along with a comparison of the message complexity of the proposed security protocol with that of the current ZigBee protocol.

• Convergence Security Journal
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• v.8 no.2
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• pp.27-34
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• 2008

In this paper, we designed and implemented mobile object automatic system based on senor networks for telematics. For developing this system, we gather the various sensing data through wireless communication method using zigbee sensor networks and analyze them in monitoring equipment. And we enable the driver to recognize the car state information on the whole by interfacing analyzed data to telematics unit. And, we implemented automatic controller that can control temperature and humidity in car automatically by actuating air conditioner based on the data that was monitored throughout temperature sensor, humidity sensor and brightness sensor based on sensor networks.

• Journal of Convergence Society for SMB
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• v.5 no.4
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• pp.31-36
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• 2015

Recently, the necessity of Internet of Things in conjunction between devices is increasing. However, there are increasing security threats while applying various communication technologies in the Internet of Things. In this paper, we propose a security countermeasures to minimize damage to the security of a variety of security technologies used in the Internet of Things in order to improve the efficiency of the Internet of Things. The proposed method defined the environment to minimize security damage between home devices such as TV, washing machine, refrigerator, boiler and medical devices such as Analyzers, blood glucose meters, blood pressure monitors that are used in daily life. In addition, a variety of technologies(Zigbee, Wi-Fi, NFC, RFID, etc.) that are used in the Internet of Things may be under integrated management.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.267-270
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• 2014

As Smart Device research processes, the needs of information security in light devices is increasing. For example, Zigbee provide Information Security by applying $AES-CCM^*$ defined IEEE 802.15.4 standard. However, according to information security law in Korea, only devices with KCMVP certification can be used in government organization and facilities. Therefore, this paper provide a solution to apply ARIA-CCM and ARIA-GCM for KCMVP in reserved field of IEEE 802.15.4 standard. For analyzing performance, we provide the speed test result of ARIA-CCM and ARIA-GCM comparing with $AES-CCM^*$.

• Review of KIISC
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• v.20 no.5
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• pp.56-64
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• 2010

AMI는 스마트 그리드 구축을 위한 핵심 기술로, 현재의 단방향 폐쇄적 에너지 공급에서 양방향 에너지 종합관리시스템 구축을 위한 기반 기술이다. 스마트 미터 및 AMI 구축을 통하여 전기요금에 대응하여 에너지를 절약하는 가전 기기 보급 및 부하 관리가 실현되고, 최대 전력의 감소를 통하여 추가적인 발전소 건설비용이 절약되게 된다. Zigbee는 AMI 통신 구현을 위한 표준 기술로 개발되고 있다. 본 논문에서는 Zigbee 기반 AMI 시스템에서 AMI 시스템의 보안 특성 및 보안 요구사항에 대한 분석 결과를 제시하고자 한다.