• KIPS Transactions on Computer and Communication Systems
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• v.10 no.10
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• pp.277-284
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• 2021

Recently, the smart home environment is expected to be a platform that collects, integrates, and utilizes various data through convergence with wireless information and communication technology. In fact, the number of smart devices with various sensors is increasing inside smart homes. The amount of data that needs to be processed by the increased number of smart devices is also increasing, and big data processing systems are actively being introduced to handle it effectively. However, traditional big data processing systems have all requests directed to cluster drivers before they are allocated to distributed nodes, leading to reduced cluster-wide performance sharing as cluster drivers managing segmentation tasks become bottlenecks. In particular, there is a greater delay rate on smart home devices that constantly request small data processing. Thus, in this paper, we design a Apriori-based big data system for effective data processing in smart home environments where frequent requests occur at the same time. According to the performance evaluation results of the proposed system, the data processing time was reduced by up to 38.6% from at least 19.2% compared to the existing system. The reason for this result is related to the type of data being measured. Because the amount of data collected in a smart home environment is large, the use of cache servers plays a major role in data processing, and association analysis with Apriori algorithms stores highly relevant sensor data in the cache.

• Journal of Broadcast Engineering
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• v.21 no.3
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• pp.298-306
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• 2016

With the advent of Internet of Things (IoT) technology that allows the communications between things and devices over the Internet, a lot of researches on the IoT services, such as smart home or healthcare, have been progressed. In the existing machine-to-machine (M2M) communications, however, since the underlying link-layer technologies, such as Bluetooth or ZigBee, do not use the Internet Protocol (IP) communication, those technologies are not suitable to provide the IoT services. Accordingly, this paper discusses how to provide the Internet services in the M2M communication, and propose an implementation of the Constrained Application Protocol (CoAP) over 6LoWPAN for providing IoT services in the BLE networks. Based on the implementation, we compared the performance between HTTP and CoAP for IoT communications. From the experimental results, we can see that the CoAP protocol gives better performance than the HTTP protocol with two times higher throughput, 21% faster transmission time, and 22% smaller amount of generated packets.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.29 no.2
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• pp.377-391
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• 2019

Recently, system studies using tokens and block chains for authentication, access control, etc in IoT environment have been going on at home and abroad. However, existing token-based systems are not suitable for IoT environments in terms of security, reliability, and scalability because they have centralized characteristics. In addition, the system using the block chain has to overload the IoT device because it has to repeatedly perform the calculation of the hash et to hold the block chain and store all the blocks. In this paper, we intend to manage the access rights through tokens for proper access control in the IoT. In addition, we apply the Tangle to configure the P2P distributed ledger network environment to solve the problem of the centralized structure and to manage the token. The authentication process and the access right grant process are performed to issue a token and share a transaction for issuing the token so that all the nodes can verify the validity of the token. And we intent to reduce the access control process by reducing the repeated authentication process and the access authorization process by reusing the already issued token.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2016.10a
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• pp.569-572
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• 2016

It is currently associated with the increase in smart home devices. So they are getting a lot IoT platform for managing and integrating these devices. However, existing platforms lack the firmware management for each device. In this paper, We will make easier the management of firmware, using a technique called POTA. This technology is a technology that allows you to update the firmware using a wireless internet without a computer and Utilizing the TR-069 protocol, we propose a system for controlling each device in CPE.

• Journal of Digital Convergence
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• v.18 no.9
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• pp.57-62
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• 2020

Smart home based on Internet of things (IoT) is rapidly emerging as an exciting research and industry field. However, security and privacy have been critical issues due to the open feature of wireless communication channel. As a step towards this direction, Shuai et al. proposed an anonymous authentication scheme for smart home environment using Elliptic curve cryptosystem. They provided formal proof and heuristic analysis and argued that their scheme is secure against various attacks including de-synchronization attack, mobile device loss attack and so on, and provides user anonymity and untraceability. However, this paper shows that Shuai et al.'s scheme does not provide user anonymity nor untraceability, which are very important features for the contemporary IoT network environment.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.10a
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• pp.540-542
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• 2014

The Universal Plug and Play (UPnP) specification permits networked devices to discover each other and to provide diverse services in the home network environment. Recently, new paradigms such as mobile connected computing, cloud-based service delivery, smart device content sharing, and Internet of Things (IoT) have emerged, but the home network based UPnP shows functional limitations in supporting such paradigms. To support them, the UPnP Forum has recently extended the capabilities of the existing UPnP, calling it UPnP+. In this paper, the UPnP Device Architecture V2.0 (UDA 2.0), which forms the basis of UPnP+, is presented. We present how UDA 2.0 enables the expansion of the home network to wide-area networks and non-IP device domains.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.04a
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• pp.483-485
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• 2017

최근 무선 통신 기술과 센서 디바이스들의 발달로 인터넷을 기반으로 모든 사물을 연결하여 사람과 사물, 사물과 사물 간의 정보를 상호 소통 가능한 센서 기반 IoT 환경이 다양한 분야에 활용되고 있다. 이러한 사물인터넷 환경은 지능형 서비스를 위해 다양하고 방대한 양의 디바이스 정보를 수집하며, 사용자 정보를 기반으로 서비스를 제공받고 디바이스를 제어해야 하며, 이기종 간의 디바이스를 활용함으로 올바른 표준을 기반으로 통신이 이루어져야 한다. 하지만, 사물인터넷 환경에서의 기존 연구나 표준 정의를 살펴보면, 현재 IoT 서비스에서는 이미 취약점이 들어난 커버로스 및 센서 노드의 수를 고려하지 않은 PKI 기반 보안 기술이 활용되고 있다. 따라서, 본 논문에서는 안전한 디바이스 인증을 위한 무인증서 기반 상호 인증 기법을 제안한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2017.07a
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• pp.247-248
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• 2017

본 논문은 라즈베리 파이(Raspberry Pi)를 이용한 스마트 원격 제어 멀티탭 시스템(Smart Remote Control Multitap System)을 사용자 지향적인 목표를 두고 개발하여 단순화, 간편화 하였다. 오늘날 사물 인터넷(IoT)을 통한 가정 자동화(Home Automation)을 통해 편리한 일상생활이 가능해졌으며, 과거에 비해 많은 이점을 누리게 됐다. 이에 따라 본 논문은 일상생활 중 접할 수 있는 가전제품 중 멀티탭을 중심으로 개발하였다. 또한 가정이나 사무실에서 사용함에 따라 편의성과 휴대성, 접근성에 수익성까지를 고려하여 시스템을 구현하였다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2018.07a
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• pp.505-506
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• 2018

사물인터넷 리모콘은 스마트폰 애플리케이션으로 제어하고 있다. 그러나 제조사가 다른 디바이스를 사용할 경우 여러 애플리케이션을 설치하여 사용하여야 한다. 본 논문에서는 이러한 스마트 홈 환경에서 사물인터넷 디바이스와 서비스를 통합 제어할 수 있는 사물인터넷 리모컨을 제안한다. 사물인터넷 리모컨을 WiFi를 통해 인터넷에 연결하고 서비스 서버를 통해 버튼 입력 이벤트를 다른 디바이스 혹은 서비스로 전송하여 직접 제어할 수 있는 사물인터넷 리모컨이다. 그리고 사물인터넷 리모컨의 초기 설정을 위한 애플리케이션과의 연동 테스트를 진행하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.602-605
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• 2017

본 논문에서 우리는 최근 심각한 사회문제로 떠오르고 있는 '층간소음'을 공학기술과 접목하여 이를 저감 시킬 수 있는 방안을 제시한다. 현재 4차산업혁명시대를 맞이하여 인공지능, AR(Augmented Reality), VR(Virtual Reality), IOT(Internet Of Things), 빅 데이터(Big Data) 등이 등장하고 있다. 우리는 '층간소음' 저감효과를 이끌어 낼 수 있는 방안으로 아두이노를 활용해 홈 IOT와 결합한 형태를 제안한다. 우리는 먼저 기존의 '층간소음' 해결절차를 설명하고 이를 보완한 시스템을 설계하고 이를 구현한다. 우리는 본 논문에서 제시된 방안인 '아두이노를 이용한 홈 IOT 층간소음 측정 어플리케이션'을 통해 더 나은 주거 환경을 조성할 수 있을 것이라 기대한다.