• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.3
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• pp.655-659
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• 2016

In this paper, we propose new detection and detour methods against packet drop attacks for availability in the Internet of Things (IoT) based on the IEEE 802.15.4e and RPL protocol standards that employ IPv6. We consider the rank value of RPL and the consecutive packet drops to improve the detection metrics, and also take into account the use of both sibling and child nodes on a RPL routing path to construct the detour method. Our simulation results show that the proposed detection method is faster than the previous result, and the detour method improves the detour success rate.

• Journal of IKEEE
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• v.23 no.3
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• pp.971-977
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• 2019

This paper presents an experimental result showing the encryption and decryption times of the AES and LEA algorithms. AES and LEA algorithms are international and Korean standards for block ciphers, respectively. Through experiments, this paper investigates the applicability of the LEA algorithm for light weight IoT devices. In order to measure the encryption and decryption times, 256-bit and 128-bit secret keys were randomly generated for AES and LEA, respectively. Under our test environment using an Arduino microcontroller, the AES algorithm takes about 45ms for encryption and decryption processes, whereas the LEA algorithm takes about 4ms. Even though processing times of each algorithm may vary much under different implementation and test environments, this experimental result shows that the LEA algorithm can be applied to many light weight IoT devices for security goals.

• The Journal of the Korea institute of electronic communication sciences
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• v.19 no.3
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• pp.625-632
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• 2024

This paper analyzed the changes in the curriculum of computer and software-related majors that educate the core ICT technologies needed for the 4th Industrial Revolution, before and after the COVID-19 pandemic. According to the standard classification of university education units, 172 majors classified into Applied Software Engineering, Computer Science·Computer Engineering, and Artificial Intelligence Engineering were targeted, and the curricula of 2023 and 2019 were compared and analyzed. As a result of the analysis, the introduction of the related curriculum for each curriculum group increased by about 2.6%p before and after the COVID-19 pandemic (2023 84.2%, 2019 81.6%). and the 4th Industrial Revolution response index increased by 9.5 points (37.0 in 2023, 27.5 in 2019)

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2019.06a
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• pp.276-278
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• 2019

현재 IoT 분야에서는 블록 체인 도입을 적극적으로 하고 있으며 자동화된 거래를 활성화하기 위해 스마트 컨트랙트를 적극 활용하려는 움직임이 많다. MPEG-IoMT(Internet of Media Thing)는 미디어를 다루는 사물인터넷 간에 미디어 데이터 또는 가공된 데이터를 전송하는 표준이다. MPEG-IoMT 에서 블록체인을 도입하기 전에 앞서 컨트랙트와 관련된 MPEG-21 에 대해 전반적으로 살펴보고 MPEG-21 를 활용하여 MPEG-IoMT 내 블록체인 도입 및 스마트 컨트랙트 표현에 대한 표준화 방향성을 제시하고자 한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• fall
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• pp.15-17
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• 2021

사물인터넷 등, ICT 기술을 활용하여 현실의 공간으로부터 수집된 정보를 초정밀 가상 공간정보 기술과 융복합하여 제공하는 디지털 트윈 기술이 대두되고 있다. 이러한 디지털 트윈 기술은 제조, 교통, 에너지, 환경, 의료 등 다양한 현실 세계의 문제를 분석하고 해결하기 위한 기술로 확장되고 있다. 본 논문은 재난 안전, 특히 화재 안전분야에서 디지털 트윈 시스템 적용방안을 제시하는 것을 목적으로 한다. 이를 위해 화재 안전과 관련하여 다양한 센서의 수집 및 융복합처리와 디지털 트윈을 위한 표준중개 변환 방법을 제안하였다. 또한, 센서객체 및 공간 객체 모델링을 통하여 디지털 트윈 공간을 구성하고 수집된 다양한 화재안전정보와 맵핑 및 분석을 수행하는 디지털 트윈 화재 안전시스템을 제안하고, 프로토타입을 개발하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.10a
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• pp.787-790
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• 2015

스마트폰의 등장을 시작으로 사물과 인터넷의 결합이 급속히 진행되면서 다양하고 새로운 시장이 형성 되고 있다. 특히 모바일 네트워크가 확산되면서 소비자의 스마트 홈 시장에 대한 관심이 높아졌으며 다양한 기업들이 스마트 홈 시장에 진입하고 있다. 본 논문에서는 다양한 스마트 홈 기술을 소개한다. OneM2M, AllJoyn의 플랫폼 구조와 보안 표준을 살펴보고 IoTivity, Homekit, Thread의 특징을 분석하여 스마트 홈 기술의 동향을 분석한다.

• Journal of Internet of Things and Convergence
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• v.6 no.4
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• pp.81-87
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• 2020

This paper creates a standard node for acquiring sensor data from various industrial sensors (IoT/non-IoT) for the establishment of Smart Factory Digital Twin, and provides inter-compatible data by linking zones by group/process to secure data stability and to ensure the digital twin (Digital Twin) of Smart Factory. The process of the Zone Master platform contains interface specifications to define sensor objects and how sensor interactions between independent systems are performed and carries out individual policies for unique data exchange rules. The interface for execution control of the Zone Master Platform processor provides system management, declaration management for public-subscribe, object management for registering and communicating status information of sensor objects, ownership management for property ownership sharing, time management for data synchronization, and data distribution management for Route information on data exchange.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2014.11a
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• pp.86-87
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• 2014

JPEG 표준화 기구에서 표준화 중인 JPEG AR 표준은 증강 현실 응용을 구성하는 요소간의 인터페이스를 표준화하고 있다. 본 논문에서는 증강 현실 기술을 기반으로 기존 미디어에 새롭게 가상 정보를 추가한 증강 미디어 서비스(개인화 서비스, 증강 방송, 사물 인터넷과 결합한 증강 미디어 서비스)를 JPEG AR 표준 측면에서 고찰하고, 이들 서비스를 위한 JPEG AR 표준의 추가 요소를 살펴본다. 세 가지 서비스를 구체적으로 살펴본바, JPEG AR 표준은 기존의 증강 현실 표준보다 유연한 시스템 구조를 갖고 있어 다른 분야 또는 시스템과의 연결이 용이하고, 이에 따라 증강 미디어 서비스뿐 아니라 새로운 융 복합 기술을 창출하는데 일조할 것으로 기대된다.

• Smart Media Journal
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• v.10 no.2
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• pp.84-91
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• 2021

In the EU GDPR, when collecting personal information, the right of the information subject(user) to consent or refuse is given the highest priority. Therefore, the information subject must be able to withdraw consent and be forgotten and claim the right at any time. Especially, restricted IoT devices(Constrained Node) implement the function of consent of the data subject regarding the collection and processing of privacy data, and it is very difficult to post the utilization content of the collected information. In this paper, we designed and implemented a management system that allows data subjects to monitor data collected and processed from IoT devices, recognize information leakage problems, connect, and control devices. Taking into account the common information of the standard OCF(Open Connectivity Foundation) of IoT devices and AllJoyn, a device connection framework, 10 meta-data for information protection were defined, and this was named DPD (Data Protection Descriptor). we developed DPM (Data Protection Manager), a software that allows information subjects to manage information based on DPD.

• Journal of Broadcast Engineering
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• v.26 no.4
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• pp.356-367
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• 2021

With the recent development of IoT and artificial intelligence technology, research and applications for optimization of real-world problems by collecting and analyzing data in real-time have increased in various fields such as manufacturing and smart city. Representatively, the digital twin platform that supports real-time synchronization in both directions with the virtual world digitized from the real world has been drawing attention. In this paper, we define a digital twin concept and propose a digital twin platform prototype that links real objects and predicted results from the virtual world in real-time by utilizing the oneM2M-based IoT platform. In addition, we implement an application that can predict accidents from object collisions in advance with the prototype. By performing predefined test cases, we present that the proposed digital twin platform could predict the crane's motion in advance, detect the collision risk, perform optimal controls, and that it can be applied in the real environment.