• KIISE Transactions on Computing Practices
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• v.23 no.9
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• pp.550-556
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• 2017

Due to the rapid growth and development of Internet of Things (IoT), various devices are now accessible and controllable anytime from anywhere. However, the current IoT system requires a series of complex steps (e.g., launch an application, choose a space and thing, control the thing, etc.) to control the IoT devices; therefore, IoT suffers from a lack of efficient and intuitive methods of interacting with users. To address this problem, we propose a novel IoT control framework based on IoT tags and social messages. The proposed system provides an intuitive and efficient way to control the device based on the device ownership: 1) users can easily control the device by IoT tagging, or 2) users can send an IoT social message to the device owner to request control of the tagged device. Through the development of the prototype system, we show that the proposed system provides an efficient and intuitive way to control devices in the IoT environment.

• Information and Communications Magazine
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• v.20 no.5
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• pp.582-594
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• 2003

유비쿼터스 혁명은 현재 사용되고 있는 모든 통신단말기는 물론, 모든 사물에 소형의 컴퓨터가 내장되고 해당사물의 기능 및 상태와 같은 정보를 광대역의 네트워크 환경을 통해서 자유롭게 주고 받는 환경을 구성하여, 기존에 공상과학 영화에서나 볼 수 있었던 미래 인류의 삶을 구체적으로 현실화 시킬 수 있을 것으로 기대된다. 유비궈터스 환경은 인터넷을 기반으로 구축될 전망이며 무수히 많은 단말 및 각종 센서들을 유무선 통신기술로 연결하기 위해서는 방대한 양의 식별자가 필요하다. 그러나 기존 인터넷 망에서 사용되고 있는 IPv4의 경우 그 식별자인 인터넷 주소가 이미 부족한 상태이므로 유비쿼터스 환경에 적용하기는 어려운 상황이다. 따라서 유비쿼터스 혁명을 위해서는 새로운 인터넷 주소체계를 필요로 하는데 차세대 인터넷 프로토콜로 개발된IPv6는 이러한 유비쿼터스 환경에 적용될 수 있는 많은 장점을 가지고 있으며 유비쿼터스 혁명을 시작하고 완성할 수 있는 핵심 기능으로 주목받고 있다. 본 논문에서는 이러한 미래사회의 모습을 변화시킬 유비쿼터스 혁명과 이러한 혁명을 성공적으로 이끌기 위해 필수적인 네트워킹 기술조서의IPv6의 주요 특성과 향후 발전 방향에 대해 기술한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.890-891
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• 2016

최근 사물인터넷 기술이 널리 사용되고 있으며, 사물인터넷을 기반으로 다양한 시스템이나 서비스가 개발되어 운영되고 있다. 본 논문에서는 사물인터넷 기술을 기반으로 하는 교수-학생을 위한 실시간 부재 알림 시스템을 설계하고 구현하였다. 개발된 실시간 알림 시스템 프로토타입을 통해 학생은 교수의 재실 및 부재 상태를 실시간 방식으로 확인 할 수 있다. 이를 통해 교수-학생간의 학생 상담 등의 진행에 좀 더 효율적인 의사소통이 가능하다.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.250-251
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• 2016

사물인터넷은 기존의 여러 ICT기술과 유,무선 장비의 네트워크 및 다양한 통신 기술들이 적용된 것을 의미한다. 최근 다양한 사물 인터넷에 대한 발전은 경량화, 소형화 되어가며 OSHW(Open Source HardWare)을 기반으로 점차 다양화 되었다. 이에 따라 사물인터넷 다양한 디바이스와 펌웨어, 암호학에 대한 연구는 활발하게 진행되고 있다. 하지만 특정 하드웨어의 센서 디바이스에 대한 연구는 부족하다. 본 논문에서는 OSHW 중 하나인 AVR기반의 아두이노 개발도구에 대한 임시 파일에 대해 분석하고 메모리 초기화 방법에 대해 제안한다. 또한 임시파일을 이용한 메모리 초기화 방법을 이용하여 사용자정보와 메모리 공격에 대한 데이터 유출을 방지할 수 있다.

• KIISE Transactions on Computing Practices
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• v.23 no.5
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• pp.284-292
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• 2017

With the development of Internet of Things (IoT) technology, the combination of ICT and medical services has been increasing to improve the quality of medical services. Using the IoTs, we can collect personal health information continuously in a patient's everyday life. We expect that this will improve the quality of medical service through analysis. However, the problem of ensuring the protection of personal information within the personal health information has been hampering the research, development, and application of such services. Other problems include lack of IoT devices and lack of user convenience for collecting health information about a patient's everyday life. Therefore, in this study, we construct a daily health information management service that can collect the health related information at any time and store this data in personal storage. This data is then only provided to the healthcare worker when necessary. We built a test bed for an IoT-based smart home platform and are currently conducting user experiments. Based on the results of this study, we are attempting to provide a high quality medical trial service based on daily health information through linkage with medical device manufacturers, medical clinics, insurance companies, etc. We expect the proposed health information management service will contribute to the revitalization of smart health care services via activating various health related IoT devices and analyzing daily health information.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.21 no.2
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• pp.97-101
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• 2021

With the development of the Internet of Things technology, new devices are being developed and used to provide various applications and services. Most IoT devices have a high probability of error because they operate in harsh environments with limited resources. In addition, it is necessary to manage the Internet of Things devices dynamically because new devices are constantly deployed. In this paper, we design a system that allows users to monitor the mounting of new devices to perform the necessary tasks and implement prototypes to validate their operability. Our system also provides a web-based programming interface to direct work on new modules and share work content with each other.

• The Journal of the Convergence on Culture Technology
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• v.2 no.4
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• pp.77-82
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• 2016

IoT technology was selected as one of IT 10 strategic technologies by gartner from 2013 to 2015, and implements advanced smart society while enabling interaction between people and things. Because IoT devices are connected to the Internet, they are involved in issues including exposure of private lives, for example, hacking to result in wireless signal interference, data theft, data modification and forgery and service denial, and critical security issues including threat to national confidential information and facilities. This study aims to suggest a method for examining threats to security through IP exposure of IoT devices and examining related problems to minimize threats to security through IP exposure including exposure of private lives or damages to the national infrastructure system.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.17 no.2
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• pp.1-6
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• 2017

Due to the recent advances in IoT technologies, reducing power consumption in battery-based IoT devices becomes an important issue. An IoT device is a kind of real-time systems, and processor voltage scaling is known to be effective in reducing power consumption. However, recent research has shown that power consumption in memory increases dramatically in such systems. This paper aims at combining processor voltage scaling and low-power NVRAM technologies to reduce power consumption further. Our main idea is that if a task is schedulable in a lower voltage mode of a processor, we can expect that the task will still be schedulable even on slow NVRAM memory. We incorporate the NVRAM memory allocation problem into processor voltage scaling, and evaluate the effectiveness of the combined approach.

• Journal of Digital Convergence
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• v.16 no.9
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• pp.179-185
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• 2018

Technology of Internet of Things (IoT) which is receiving the spotlight recently as a new growth engine of Information Communications Technology (ICT) industry in the $4^{th}$ Industrial Revolution needs trustworthiness beyond simple technology of security. IoT devices should consider trustworthiness from planning and design of IoTs so that everyone who develop, evaluate and use the device can measure and trust its security. Increased number of IoTs and long lifetime result in the increased securituy vulnerability due to the difficulty of software patch and update. In this paper, we investigated security and scalability issues of current IoT devices through research of the technical, political and industrial trend of IoT. In order to overcome the limitations, we propose an automatic verification of software integrity utilizing and a political solution to apply cyber killchain based security mechanism using hash which is an element technology of blockchain to solve these problems.

• Journal of the Korean Institute of Intelligent Systems
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• v.25 no.6
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• pp.565-570
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• 2015

In this paper, we implemented the smart door lock system that control remotely devices using the concept of internet of things. Internet of things is intelligent system that can help devices to communicate with people and devices. And recently internet of things is getting attention because of advance of hardware technology and big data. The smart doorlock system based on internet of things used raspberry pi, sensor and doorlock. Using the smart phone, doorlock can be controlled from the raspberry pi server. And the user can identify some people that is in front of doorlock. also user can check around of doorlock in realtime using the raspberry pi camera.