• 대한안전경영과학회지
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• 제15권4호
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• pp.171-178
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• 2013

Workers are avoiding production/manufacturing sites due to the poor working environment and concern over safety. Small and medium-sized businesses introduce new equipment to secure safety in the production site or ensure effective process management by introducing the real-time monitoring technique for existing equipment. The importance of real-time monitoring of equipment and process in the production site can also be found in the ANSI/ISA-195 model. Note, however, that most production sites still use paper-based work slip as a process management technique. Data reliability may deteriorate because information on the present condition of the production site cannot be collected/analyzed properly due to manual data writing by the worker. This paper introduces the monitoring and process management technique based on a direct facility interface to secure safety in the field by improving the poor working environment and enhance there liability and real-time characteristics of the production data. Since the data is collected from equipment in real-time directly through the SIB-based interface and PLC-based interface, problems associated with workers' manual data input are expected to be solved; safety can also be improved by enhancing workers' attention to work by minimizing workers' injuries and disruption.

• 한국인터넷방송통신학회논문지
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• 제18권6호
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• pp.33-41
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• 2018

스마트 캠퍼스의 플랫폼으로 사물 인터넷에 대한 아이디어가 점점 대중화되고 있다. 인터넷에 연결하기 위해 통신 네트워크, 센서 노드 및 게이트웨이로 구성된 인프라가 필요하며 각 센서 노드는 환경에서 데이터를 수집할 수 있다. 본 논문은 스마트 캠퍼스 모니터링을 적용하기 위해 인터넷에 구성한 무선 센서 네트워크를 설명한다. 무선 센서 네트워크 모니터링은 저전력 구현 및 통합 시스템을 사용하는 완벽한 솔루션이다. 그러나 제한된 컴퓨팅 범위, 제한된 컴퓨팅 성능, 네트워크 프로토콜의 가용성 부족, 프로그래밍 보안 부족 및 기밀성, 무결성 및 가용성 분야의 보안 오류로 인해 수많은 제약이 있다. WSNM 노드를 위한 새로운 보안 기술과 기능이 개발되었다. 보안 네트워크 연구 개발 및 서비스 거부 (DOS) 및 복잡성 공격 방지를 위한 시스템을 제안하였다. 이러한 시스템이 제대로 구현되면 사전 할당을 통한 에너지 효율성 메커니즘과 안전한 루틴 알고리즘을 통해 핵심 관리 모델의 새로운 키를 제공 할 수 있다.

• Journal of Biosystems Engineering
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• 제36권4호
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• pp.279-284
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• 2011

Protected vegetable production area is greater than 26% of the total vegetable production area in Korea, and portion of protected production area is increasing for flowers and fruits. To secure stable productivity and profitability, continuous and intensive monitoring and control of protected crop production environment is critical, which is labor- and time-consuming. Failure to maintain proper environmental conditions (e.g., light, temperature, humidity) leads to significant damage to crop growth and quality, therefore farmers should visit or be present close to the production area. To overcome these problems, application of remote monitoring and control of crop production environment has been increasing. Wireless monitoring and control systems have used CDMA, internet, and smart phone communications. Levels of technology adoption are different for farmers' needs for their cropping systems. In this paper, potential of wireless remote monitoring of protected agricultural environment using CDMA SMS text messages was reported. Monitoring variables were outside weather (precipitation, wind direction and velocity, temperature, and humidity), inside ambient condition (temperature, humidity, $CO_2$ level, and light intensity), irrigation status (irrigation flow rate and pressure), and soil condition (volumetric water content and matric potential). Scenarios and data formats for environment monitoring were devised, tested, and compared. Results of this study would provide useful information for adoption of wireless remote monitoring techniques by farmers.

• 항공우주기술
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• 제13권1호
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• pp.55-62
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• 2014

비행종단수신기는 발사체 비행 중 발생할 수 있는 비정상 상태에 대비하여 비행을 중단시키는 지상 명령을 수신하는 장치이다. Secure 톤은 IRIG에서 규정한 7개의 음성 주파수 대역 톤 신호 중 2개의 톤을 조합하여 11개의 연속적인 부호로 명령 포맷을 구성한다. 한국형발사체 탑재를 고려해 개발 중인 비행종단수신기는 Secure 톤에 암호화 기능을 추가한 MHA 명령 방식을 적용하였다. 제작된 비행종단수신기의 성능 및 기능을 점검하기 위해선 동일한 규격의 RF 신호를 발생함과 동시에 수신기의 외부 출력 포트를 모니터링하고 RS-422 통신을 제어하며 시험 데이터 저장 기능을 제공하는 점검장비가 필요하다. 본 논문에서는 비행종단수신기 인터페이스 및 적용된 명령 방식에 대한 간략한 설명과 함께 LabVIEW 기반으로 제작된 점검장비의 하드웨어 구성, 소프트웨어 구현 및 기능 점검 결과에 대해 기술한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권4호
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• pp.1553-1571
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• 2018

Currently, many of schemes for smart grid data aggregation are based on a one-level gateway (GW) topology. Since the data aggregation granularity in this topology is too single, the control center (CC) is unable to obtain more fine-grained data aggregation results for better monitoring smart grid. To improve this issue, Shen et al. propose an efficient privacy-preserving cube-data aggregation scheme in which the system model consists of two-level GW. However, a risk exists in their scheme that attacker could forge the signature by using leaked signing keys. In this paper, we propose a secure and fine-grained electricity consumption aggregation scheme for smart grid, which employs the homomorphic encryption to implement privacy-preserving aggregation of users' electricity consumption in the two-level GW smart grid. In our scheme, CC can achieve a flexible electricity regulation by obtaining data aggregation results of various granularities. In addition, our scheme uses the forward-secure signature with backward-secure detection (FSBD) technique to ensure the forward-backward secrecy of the signing keys. Security analysis and experimental results demonstrate that the proposed scheme can achieve forward-backward security of user's electricity consumption signature. Compared with related schemes, our scheme is more secure and efficient.

• Journal of information and communication convergence engineering
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• 제10권4호
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• pp.343-348
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• 2012

ZigBee Network is enabling technology for home automation, surveillance and monitoring system. For better secure network environment, secure and robust security model is important. The paper proposes an application, attribute-based proxy re-encryption on ZigBee networks. The method can distribute the authority to designated sensor nodes to decrypt re-encrypted ciphertext with associated attributes. However, a previous method is required to compute complex pairing operations. The high complexity is not suited to low resource device sensor networks, and it does not provide routing security either. To resolve these problems, we present a novel mechanism. The method can reduce overhead by imposing overhead to full function devices and ensure routing paths as well.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 추계학술대회
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• pp.154-156
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• 2012

This paper presents a user authentication scheme for healthcare application using wireless medical sensor networks, where wireless medical sensors are used for patients monitoring. These medical sensors' sense the patient body data and transmit it to the professionals (e.g., doctors, nurses, and surgeons). Since, the data of an individual are highly vulnerable; it must ensures that patients medical vital signs are secure, and are not exposed to an unauthorized person. In this regards, we have proposed a user1 authentication scheme for healthcare application using medical sensor networks. The proposed scheme includes: a novel two-factor professionals authentication (user authentication), where the healthcare professionals are authenticated before access the patient's body data; a secure session key is establish between the patient sensor node and the professional at the end of user authentication. Furthermore, the analysis shows that the proposed scheme is safeguard to various practical attacks and achieves efficiency at low computation cost.

• 디지털산업정보학회논문지
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• 제16권4호
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• pp.29-42
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• 2020

SCADA (Supervisory Control and Data Acquisition) systems for remote monitoring, data acquisition and control are applied to major industrial infrastructures including power, water and railroad. Recently, there are many researches on key management scheme for secure communication due to change to the open network environment. These systems are located at far distances and are connected to the main control center through various types of communication methods. Due to the nature of these systems, they are becoming the significant targets of cyber attack. We propose an efficient key management scheme which is established on ID-based cryptosystem without an expensive computation on MTU (Master Terminal Unit), Sub-MTU, and RTU (Remote Terminal Unit). The proposed method is secure and effective in key management among multiple legitimate devices.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2005년도 Proceedings of The 6th korea-china joint workshop on nuclear waste management
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• pp.149-155
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• 2005

The $ACP^1$ is under development for effective management of spent fuel by converting $UO_2$ into U-metal. For demonstration of this process, $\alpha-\gamma$ type new hotcell was built in the $IMEF^2$ basement. To secure against radiation hazard, this facility needs radiation monitoring system which will observe the entire operating area before the hotcell and service area at back of it. This system consists of 7 parts; Area Monitor for $\gamma$-ray, Room Air Monitor for particulate and iodine in both area, Hotcell Monitor for hotcell inside high radiation and rear door interlock, Duct Monitor for particulate of outlet ventilation, Iodine Monitor for iodine of outlet duct, CCTV for watching workers and material movement, Server for management of whole monitoring system. After installation and test of this, radiation monitoring system will be expected to assist the successful ACP demonstration.

• 한국전산구조공학회논문집
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• 제22권4호
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• pp.349-354
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• 2009

초고층 건물의 안전성 및 사용성을 합리적으로 확보하고 유지하기 위해서 부재의 구조 반응 모니터링은 필요하다. 이러한 대형 건물의 건전도 모니터링은 최근 들어 많은 연구자들에 의해서 관심 되어지고 있지만 건물 특성상 계측 대상 부재가 많고 하중과 구조반응의 관계가 복잡하기 때문에 센싱 부재 선정의 어려움으로 그 적용에 한계가 있다. 본 논문에서는 부재의 변위기여도 및 변형에너지밀도를 기반으로 초고층 건물의 안전성 모니터링을 위한 구조반응 계측 부재 선정에 대한 연구를 수행하였다.