• International Journal of Computer Science & Network Security
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• 제24권4호
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• pp.11-25
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• 2024

The proliferation of IoT devices has presented an unprecedented challenge in managing device identities securely and efficiently. In this paper, we introduce an innovative Hybrid Blockchain-Based Approach for IoT Identity Management that prioritizes both security and efficiency. Our hybrid solution, strategically combines the advantages of direct and indirect connections, yielding exceptional performance. This approach delivers reduced latency, optimized network utilization, and energy efficiency by leveraging local cluster interactions for routine tasks while resorting to indirect blockchain connections for critical processes. This paper presents a comprehensive solution to the complex challenges associated with IoT identity management. Our Hybrid Blockchain-Based Approach sets a new benchmark for secure and efficient identity management within IoT ecosystems, arising from the synergy between direct and indirect connections. This serves as a foundational framework for future endeavors, including optimization strategies, scalability enhancements, and the integration of advanced encryption methodologies. In conclusion, this paper underscores the importance of tailored strategies in shaping the future of IoT identity management through innovative blockchain integration.

• International Journal of Computer Science & Network Security
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• 제22권1호
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• pp.189-198
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• 2022

As the number of people using the Internet increases, a new application known as the Internet of Things (IoT) has been emerged. Internet of Things makes it easier for machines and objects to exchange, compute, and coordinate information autonomously without human interference. It is a tool for attaching intelligence to a variety of contemporary objects in houses, hospitals, buildings, vehicles, and even cities. As a new emerging technology, the focus in current IoT surveys does not shed the light on deep understanding for IoT fundamentals, architectures, challenges, and solutions. For this reason, the objective of this paper is to introduce specifications for IoT definitions, characteristics, functional blocks, and different architectures as a cement for better understanding. Additionally, we present current documented IoT challenges, with the existing available solution for each challenge.

• 사물인터넷융복합논문지
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• 제5권2호
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• pp.103-110
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• 2019

본 논문에서는 사물인터넷(IoT) 기술을 적용하여 고객의 전력 시설을 효율적으로 관리하기 위한 인터넷 플랫폼을 제안한다. 효율적 관리를 위한 인터넷 플랫폼은 사물간의 연결을 위한 통신 방식과 그에 따른 프로토콜, 그리고 보안요소로 구분하여 각 요소별 분석을 실시하였다. 이를 통해 전력 설비에 사용되는 기존 센서를 기반으로 센서와 서버간의 데이터 신뢰성을 위한 통신 솔루션, 데이터 관리 서버 및 보안 솔루션에 대해 개발 방안을 제시하였다. 또한, 전력설비 관리 플랫폼에서 사용될 수 있는 통신 모듈, 프로토콜 및 보안 알고리즘을 제안하고, 이를 관리하고 운영하기 위한 서버를 구축하는 방법을 제안한다.

• 한국산학기술학회논문지
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• 제19권3호
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• pp.1-7
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• 2018

IoT 환경은 다양한 디바이스들과 네트워크를 이용하여 무한대의 서비스를 제공한다. 이러한 IoT 환경 발전은 비례적으로 보안의 중요성과 직결된다. 경량 암호는 보안, 높은 처리량, 낮은 전력 소비 및 소형을 제공하는 분야이기 때문에 IoT 환경에 적합하다. 그러나 경량 암호는 새로운 암호 체계를 형성해야 하고, 제한된 리소스 범위 내에서 활용되야 한다는 문제점을 가지고 있다. 그러므로 경량 암호는 다변화/다양화 등을 요구하는 IoT 환경에 최적의 솔루션이라고 단언할 수 없다. 그러므로 이러한 단점들을 없애기 위하여, 본 논문은 기존 블록 암호알고리즘을 경량화 암호알고리즘과 같이 사용할 수 있고, 기존 시스템(센싱부와 서버와 같은)을 거의 그대로 유지하면서 IoT 환경에 적합한 방법을 제안한다. 제안된 BCL 구조는 기존 유무선 센서 네트워크에서 다양한 센서 디바이스들에 대한 암호화를 경량 암호화 같이 수행할 수 있도록 한다. 제안된 BCL 구조는 기존 블록 암호알고리즘에 전/후처리부를 포함한다. BCL 전/후처리부는 흩어져 있는 각종 디바이스들을 데이지 체인 네트워크 환경에서 동작하도록 하였다. 이러한 특징은 분산된 센서시스템의 정보보호에 최적이며 해킹 및 크래킹이 발생하더라도 인접 네트워크 환경에 영향을 미치지 못한다. 그러므로 IoT 환경에서 제안된 BCL 구조는 기존 블록암호알고리즘을 경량화 암호알고리즘과 같이 사용할 수 있기 때문에 다변화되는 IoT 환경에 최적의 솔루션을 제공할 수 있다.

• 한국환경보건학회지
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• 제44권5호
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• pp.421-432
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• 2018

Objectives: In this study, we started to develop an indoor garden integrated IoT solution based on IAQ (indoor air quality) and interconnection with an environmental database for smart management of indoor gardens. The purpose of this study was to develop and apply an integrated solution for customized air purification from an indoor garden through big data analysis using IoT technology. Methods: An IoT-based IAQ monitoring system was established in three households within a new apartment building. Based on real-time and long-term data collected, $PM_{2.5}$, $CO_2$, temperature, and humidity changes were compared to those of indoor garden applications and the analyzed results were indexed. Results As a result of the installation, all three households had no results exceeding the standard for indoor air pollution on average $PM_{2.5}$ and $CO_2$ indices. In the case of indoor garden installation, the IAQ index increased to the "Good" section after the installation, and readings in the "Bad" section shown before the installation disappeared. The comfort index also did not dip into the "Uncomfortable" section, where it had been preinstallation, and significantly lowered the average score from "Uncomfortable for sensitive groups" to "Good". Overall, the IAQ composite index for the generation of installations decreased the "Good" interval, but "Bad" did not appear. Conclusions In this study on developing an integrated solution for IAQ based on IoT indoor gardens, big data was analyzed to determine IAQ and comfort indexes and an IAQ composite index. Through this process, it became understood that it is necessary to monitor IAQ based on IoT.

• 한국전자통신학회논문지
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• 제13권6호
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• pp.1405-1410
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• 2018

의료기관에서 사용하는 링거는 몸에 수분을 공급하여 열이나 탈수 상태에 있던 몸의 상태를 회복시켜 주는데 도움을 주는 주사제 중 하나로 의료진이 해당 환자에게 처방된 링거의 양을 수시로 점검하여 링거의 교체 시기를 확인하여야 한다. 하지만 현재 간호사 인력은 매우 부족하고 부여된 업무량도 적지 않아 업무에 부하가 발생하게 되고 이로 인하여 환자 및 보호자에게 양질의 의료서비스를 제공하지 못하게 된다는 문제점이 발생하게 된다. 이러한 문제점을 해결하기 위해 본 논문에서는 비접촉식 센서와 WiFi통신방식을 이용한 IoT 디바이스와 OCS 연동을 통한 링거 교체 시기 관제 시스템을 설계하고 구현함으로써 의료진에게 해당 환자의 링거 자동 교체 타이밍을 알려 과거 비효율적이던 중간 단계를 생략함으로써 링거 교체 업무를 효율적으로 운영하고 환자 및 보호자에게 양질의 의료서비스를 제공할 수 있기를 기대한다.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2020년도 제62차 하계학술대회논문집 28권2호
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• pp.139-142
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• 2020

NB-IoT(Narrow Band Internet of Things) is an emerging LPWAN(Low Power Wide Area Network) radio technology. NB-IoT has many advantages like low power, low cost, and high coverage. However low bandwidth and low sampling rates also lead to poor positioning accuracy. This paper proposed a solution to optimize positioning accuracy under the OTDOA(Observed Time Difference of Arrival) approach by utilizing MLR(Multiple Linear Regression) models. Through the MLR model to predict the influence degree of weather(temperature, humidity, light intensity and air pressure) on the arrival time of signal transmission to improve the measurement accuracy. The improvement of measurement accuracy can greatly improve IoT applications based on NB-IoT.

• Journal of Multimedia Information System
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• 제9권3호
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• pp.209-218
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• 2022

Industrial IoT applications, including smart factories, require two problem-solving to build data monitoring systems required by services from distributed IoT sensors (smart sensors). One is to overcome proprietary protocols, data formats, and hardware differences and to uniquely identify and connect IoT sensors, and the other is to overcome the problem of changing the server-side data storage structure and sensor data transmission format according to the addition or change of service or IoT sensors. The IEEE 1451.4 standard-based or IPMI specification-based smart sensor technology supports the development of plug-and-play sensors that solve the first problem. However, there is a lack of research that requires a second problem-solving, which requires support for the plug-in of IoT sensors into remote services. To propose a solution for the integration of these two problem-solving, we present a IoT sensor platform, a service system architecture, and a service plugin protocol for the MQTT-based IIoT application environment.

• 대한임베디드공학회논문지
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• 제10권4호
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• pp.199-206
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• 2015

In this paper, we present the implementation of a secure OTP(One Time Password) generator for IoT(Internet of Things) devices. Basically, MTM(Mobile Trusted Module) is used and expanded considering secure IoT services. We combine the MTM architecture with a new hardware-based OTP generation engine. The new architecture is more secure, offering not only the security of devices but also that of the OTP service. We have implemented and verified the MTM-based OTP generator on a real mobile platform embedded with the MTM chip. The proposed method can be used as a solution for enhancing security of IoT devices and services.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제9권10호
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• pp.4177-4190
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• 2015

Current research on Internet of Things (IoT) has primarily addressed the means to enhancing smart resource allocation, automatic network operation, and secure service provisioning. In particular, providing satisfactory security service in IoT systems is indispensable to its mission critical applications. However, limited resources prevent full security coverage at all times. Therefore, these limited resources must be deployed intelligently by considering differences in priorities of targets that require security coverage. In this study, we have developed a new application of Cognitive Radio (CR) technology for IoT systems and provide an appropriate security solution that will enable IoT to be more affordable and applicable than it is currently. To resolve the security-related resource allocation problem, game theory is a suitable and effective tool. Based on the Blotto game model, we propose a new strategic power allocation scheme to ensure secure CR communications. A simulation shows that our proposed scheme can effectively respond to current system conditions and perform more effectively than other existing schemes in dynamically changeable IoT environments.