• Journal of Internet of Things and Convergence
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• v.8 no.1
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• pp.79-85
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• 2022

Internet of Things (IoT) connects devices with various platforms, computing power, and functions. Due to the diversity of networks and the ubiquity of IoT devices, demands for security and privacy are increasing. Therefore, cryptographic mechanisms must be strong enough to meet these increased requirements, while at the same time effective enough to be implemented in devices with long-range specifications. In this paper, we present the performance and memory limitations of modern cryptographic primitives and schemes for different types of devices that can be used in IoT. In addition, detailed performance evaluation of the performance of the most commonly used encryption algorithms in low-spec devices frequently used in IoT networks is performed. To provide data protection, the binary ring uses encryption asymmetric fully homomorphic encryption and symmetric encryption AES 128-bit. As a result of the experiment, it can be seen that the IoT device had sufficient performance to implement a symmetric encryption, but the performance deteriorated in the asymmetric encryption implementation.

• Journal of Internet of Things and Convergence
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• v.8 no.5
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• pp.85-91
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• 2022

In the IOT social environment, which emphasizes the convergence of science and technology and emotion, this study aims to explore the experience and meaning of the experience while participating in the design convergence class based on the operation of the Learning community of Chinese graduate students majoring in design. To this end, an implementation study was conducted by visualizing various research problems using a design-based inquiry method for 12 graduate students attending T University. The design-oriented convergence class was conducted in a small group with content that was deepened into a visual strategy by the expression technique given by the external environment and the learner's own inner motivation. In order to express the perspective and intention of the research problem in the research, the convergence design research expressed using various visual strategies such as metaphorical use and analysis of visual data in the research process and sensory approach to the research problem was presented in a form that expresses the creative thinking process. As a way of exploration, the teaching method of presenting results based on various experiences suggests changes in new teaching formats, practical knowledge sharing by instructors, and community participation by learning participants.

• Journal of Digital Convergence
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• v.12 no.12
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• pp.323-328
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• 2014

D-MAC protocol is used convergence network, which is designed to connect wireless link between things. This protocol is supported to local data exchange and aggregation among neighbor nodes, and distributed control packet from sink to sensor node. In this paper, we analysis about efficiency of power consumption according to whether or not security authentication of D-MAC in convergence network. If authentication scheme is applied to MAC communication, it is related to power consumption of preamble whether or not with and without authentication process. It is reduced to energy consumption against denial attack of service, when it is applied to authentication. Future work will take the effort to deal with security authentication scheme.

• Journal of the Korea Convergence Society
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• v.9 no.1
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• pp.253-259
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• 2018

The Korea Convergence Society. Recently, as the 4th industrial revolution is rising, there are many changes in various field of industries. Among these industries, autonomous vehicles based on artificial intelligence, big data and internet of things is one of the most promising industry. Autonomous vehicle stray from classical car domain of manufacturers and suppliers, IT/Electronics suppliers and communication companies are widen their business area to autonomous vehicle technology. In this paper, we analysis the state of art of autonomous vehicle technology and development direction of industries/research institute. Finally, we discuss the social/economic effects of autonomous vehicle.

• Journal of IKEEE
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• v.19 no.2
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• pp.142-147
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• 2015

In this paper, a Kalman filter-based sensor fusion filter that measures posture by calibrating and combining information obtained from acceleration and gyro sensors was proposed. Recent advancements in sensor network technology have required sensor fusion technology. In the proposed approach, the nonlinear system model of the filter is converted to a linear system model through a Jacobian matrix operation, and the measurement value predicted via Euler integration. The proposed filter was implemented at an operating frequency of 74 MHz using a Virtex-6 FPGA Board from Xilinx Inc. Further, the accuracy and reliability of the measured posture were validated by comparing the values obtained using the implemented filters with those from existing filters.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.05a
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• pp.124-127
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• 2022

최근 IoT 기술은 가전제품, 웨어러블 디바이스, 친환경 사업등 여러가지 분야에서 사용되고 있고 각 분야의 애플리케이션의 수와 애플리케이션에 연결된 장치 수가 증가함에 따라 엄청난 양의 데이터가 생성되고 있다. 수집된 많은 양의 데이터는 전송과 저장등의 과정을 거쳐야 하지만 현재 각기다른 여러가지 IoT 플랫폼들의 프로토콜들이 존재하고 있어 서로 다른 프로토콜 간의 데이터 전송이나 디바이스 연동이 힘들다는 문제점이 존재하고 있다[1]. 또한 센서로 수집된 데이터들이 중앙 집중식 구조로 저장되기 때문에 이 데이터들을 신뢰할수 있는가에 대한 문제가 존재한다. 이 문제들을 해결하기 위해 이 논문에서는 IoT 플랫폼에서의 서로다른 프로토콜간의 연동과 데이터들의 중앙 집중화 문제를 해결하기 위한 블록체인을 활용한 IoT 플랫폼 인터워킹 프레임워크 모델을 제안하고 이어 결론과 향후 연구방향을 제시한다.

• Journal of the Korean Society for Precision Engineering
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• v.26 no.11
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• pp.7-11
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• 2009

• Information and Communications Magazine
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• v.32 no.2
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• pp.111-113
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• 2015

소셜 M2M 서비스는 지능형 M2M 플랫폼을 내장한 M2M 단말들이 자율적으로 소셜 그룹을 형성하고 상호간의 협업을 통해 창출된 지능형 M2M 융 복합 서비스를 말한다. 소셜 M2M 서비스 개발을 위해서는 그 핵심기술로 M2M 공통 서비스 기능을 지원하는 공통 프레임워크와 지능화 기술, 협업 기술, 융합 기술을 포함하는 지능형 M2M 플랫폼이 필요하며, 사물인터넷 생태계의 S(Service)-P(Platform)-N(Network)-D(Device) 각 계층별로 관련 솔루션을 효과적으로 구축하는 것이 필요하다.

• Proceedings of the Korea Information Processing Society Conference
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• 2018.05a
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• pp.222-223
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• 2018

본 논문에서는 인간과 사물, 서비스 세 가지 분산된 환경 요소에 대해 인간의 명시적 개입 없이 상호 협력적으로 정보 센싱, 네트워킹, 정보 처리 등 지능적인 기능을 제공하는 표준 IoT 플랫폼 기반에 대량의 이벤트에 대한 융합분석이 가능한 CEP(Complex Event Processing) 및 시나리오 기반 자동화된 절차에 따라 대응이 가능한 워크플로우 기술을 적용하여 중요시설감지, 국경감시, 해안감시, 도시안전 분야 등 다양한 분야에 활용이 가능한 지능형 시큐리티 플랫폼을 제안하고자 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2019.05a
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• pp.7-8
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• 2019

본 논문에서는 SIP프로토콜에 기반한 영상통화에서 지능형 AR기법을 지원하기 위한 방법에 대해서 서술 한다. 기존의 영상통화에서는 주위에 사물을 실시간 촬영하여, 바로 보낼수 있는 기능이 없었다. 휴대폰에서 AR기능은 주로 위치 서비스에 기반한 길찾기나 건물 내부의 모습을 자동으로 보여주는 용도로 많이 사용되었다. 본 연구에서는 지능형 AR을 이용하여 SIP기반 휴대폰 영상통화 도중 상대방에서 필요한 텍스트나 이미지를 자동으로 전달할 수 있는 방법을 제시함으로써, 사용자 휴대폰의 편의성을 높이고자 한다.