• Journal of the Institute of Electronics Engineers of Korea SC
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• 제44권4호통권316호
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• pp.79-88
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• 2007

Demand for the technology for access to device control network in industry and for access to building automation system via internet is on the increase. In such technology integration of a device control network with a data network such as internet and organizing wide-ranging DCS(distributed control system) is needed, and it can be realized in the framework of VDN(virtual device network)[1,2]. Specifications for device control network and data network are quite different because of the differences in application. So a router that translates the communication protocol between device control network and data network and efficiently transmits information to destination is needed for implementation of the VDN, This paper proposes the concept of NCS(networked control system) based on VDN(virtual device network) and suggests the routing algorithm that uses embedded system.[3]

• Proceedings of the Korea Information Processing Society Conference
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• 한국정보처리학회 2004년도 춘계학술발표대회
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• pp.1197-1200
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• 2004

홈 네트워크 환경은 댁내의 가전 기기들을 원격 접속 및 원격 제어가 가능하도록 연결한 네트워크 환경이다. 이동 에이전트는 네트워크 상에서 스스로 이동하면서 사용자 또는 다른 개체 대신 행동 할 수 있는 프로그램으로서 홈 네트워크 환경에서 원격 상호작용과 네트워크 부하를 줄이고 서비스를 제공할 수 있다. 이를 위해서는 서비스를 요청한 개체 및 서비스 주체에 대한 인증과정이 필요하다. 본 논문에서는 홈 네트워크 환경에서의 이동 에이전트 인증을 위한 다음 세 가지의 사항을 고려한다. 첫 째, 홈 네트워크 디바이스의 제한적인 성능, 둘 째, 홈 네트워크 디바이스의 이동성, 셋 째, 이동 에이전트의 코드 및 상태 정보 이동성. 이들에 대한 고려를 통하여 홈 네트워크 환경에 적합한 도메인 관리 기법과 인증기법을 설계한다.

• Journal of the Korean Society for information Management
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• 제38권4호
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• pp.129-152
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• 2021

This study proposed a plan to develop wearable devices suitable for female college students by analyzing female college students' perceptions and preferences for wearable devices and their needs for health care using topic modeling and network analysis techniques. To this end, 2,457 posts related to health care and wearable devices were collected from the community used by S Women's University students. After preprocessing the collected posts and comment data, LDA-based topic modeling was performed. Through topic modeling techniques, major issues of female college students related to health care and wearable devices are derived, and bi-gram analysis and network analysis are performed on posts containing related keywords to understand female college students' views on wearable devices.

• Proceedings of the Korean Information Science Society Conference
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• 한국정보과학회 2000년도 가을 학술발표논문집 Vol.27 No.2 (3)
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• pp.225-227
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• 2000

홈 네트워크의 발달과 함께 홈 네트워크를 감시하고 제어할 수 있는 사용자 인터페이스의 구현 또한 중요한 문제로 인식되고 있다. 본 논문에서 홈 네트워크의 정보들을 정적인 자료와 동적인 자료로 분류하여, 2개의 전송채널을 이용함으로써 동적인 자료의 실시간 응답 특성을 향상시킬 수 있는 GUI 서버를 제안하고, 각 디바이스의 감시/제어 모듈을 컴포넌트화 함으로써 동적 GUI 갱신과 디바이스의 추가/삭제에 따른 실시간 응답 특성을 향상시켰다.

• Journal of Korea Multimedia Society
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• 제12권4호
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• pp.540-549
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• 2009

An arbitrary mobile device configures Ad-hoc network to provide the transmission of a data and services using wireless communications. A mobile device requires authentication and encryption key management to securely communicate in the Ad-hoc network. This paper examines the trend of the authentication in the Ad-hoc network and the group key management and suggests the plan for ID-based mutual authentication and group key establishment. ID-based mutual authentication in proposed scheme uses zero knowledge in the absence of shared information and is applied to establish a session key and group key. In addition, the proposed scheme is applied to Ad-hoc network to increase the efficiency and the safety of security technology.

• Proceedings of the Korean Information Science Society Conference
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• 한국정보과학회 2000년도 가을 학술발표논문집 Vol.27 No.2 (3)
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• pp.304-306
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• 2000

내장형 디바이스를 인터넷과 연결하고자 하는 요구가 늘어나고 있다. 이러한 정보기기들을 동적으로 상호 작용하게 하는 기술로서 지니(Jini)가 최근 주목을 받고 있다. 그러나 내장형 디바이스에서 지니 서비스를 제공하기 위해 요구되는 높은 하드웨어 사양이 문제점으로 지적되고 있다. 본 논문에서는 이러한 non-Java 디바이스를 지니 네트워크에 접속하여 지니 서비스를 제공할 수 있도록 서로게이트 시스템(Surrogate System)과 non-Java 디바이스간의 프로토콜을 설계하였다.

• Journal of the Korea Institute of Information Security & Cryptology
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• 제14권5호
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• pp.109-119
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• 2004

The home network environment can be defined as a network environment, connecting digital home devices such as computer systems, digital appliances, and mobile devices. In this kind of home network environments, there will be numerous local/remote interactions to monitor and control the home network devices and the home gateway. Such an environment may result in communication bottleneck. By applying the mobile agents that can migrate among the computing devices autonomously and work on behalf of the user, remote interactions and network traffics can be reduced enormously. The mobile agent authentication is necessary to apply mobile agent concept to the home network environments, as a prerequisite technology for authorization or access control to the home network devices and resources. The existing mobile agent systems have mainly used the public key based authentication scheme, which is not suitable to the home network environments, composed of digital devices of limited computation capability. In this paper, we propose a shared key based mobile agent authentication scheme for single home domain and expand the scheme to multiple domain environments with the public key based authentication scheme. Application of the shared key encryption scheme to the single domain mobile agent authentication enables to authenticate the mobile agent with less overhead than the public key based authentication scheme.

• Review of KIISC
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• 제18권5호
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• pp.125-131
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• 2008

유비쿼터스 홈네트워크에서는 다양한 디바이스를 이용하여 복수의 도메인을 오가며 서비스를 제공하거나 제공받을 수 있을 것으로 기대되는데 이때 디바이스는 반드시 정당한 디바이스여야 하며 이를 실현하기 위하여 인증서를 사용하는 디바이스 인증 기술이 제안되었다. 그리고, 계산 능력이 작은 디바이스를 인증하기 위한 방법으로서 대칭키 암호 기술에 기반을 둔 디바이스 인가 방법을 함께 사용함으로써 계산 능력이 다른 다양한 디바이스들을 인증하는 방법이 제안되었다. 이들 방법의 공통성은 사용자의 개인 정보 유출을 피하기 위하여 사용자 정보를 사용하지 않고 디바이스 고유의 정보만을 사용하여 인증한다는데 있다. 이러한 디바이스 인증/인가 방법을 홈네트워크에 사용하였을 경우 사용자의 개인 정보는 보호되는지 확인할 필요가 있다. 본 논문에서는 기존에 제안된 유비궈터스 홈네트워크를 위한 디바이스 인증/인가 기술을 분석하여 개인 정보의 유출에 관한 문제점을 도출하고 그에 대한 대응 방법을 제안하였다.

• Journal of Internet Computing and Services
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• 제20권5호
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• pp.95-104
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• 2019

Various kinds of devices are used for the Internet of Things (IoT) service, and IoT devices mainly use communication technology that uses the frequency of the unlicensed band. There are several types of communication technology in the unlicensed band, but WiFi is most commonly used. Devices used for IoT services vary in computing resources from devices with limited capabilities to smartphones and provide services over wireless networks such as WiFi. Most IoT devices can't perform complex operations for network control, thus they choose a WiFi access point (AP) based on signal strength. This causes a decrease in IoT service efficiency. In this paper, an intelligent AP system that can efficiently control the WiFi connection of the IoT devices is implemented. Based on the network information measured by the IoT device, the access point learns using a feed forward neural network algorithm, and predicts a network connection state to control the WiFi connection. By controlling the WiFi connection at the AP, the service efficiency of the IoT device can be improved.

• The Journal of the Korea Contents Association
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• 제21권6호
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• pp.51-61
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• 2021

In the era of the 4th industrial revolution symbolized by the Internet of Things, big data and artificial intelligence, various embedded devices are increasing exponentially. These devices have communication functions despite their low specifications, so the possibility of personal information leakage is increasing, and security threats are also increasing. Embedded devices can have security issues at most levels, from hardware to services over the network. In addition, it is difficult to apply general security techniques because it has characteristics of resource constraints such as low specifications and low power, and the related technology has not been standardized. In this study, we present vulnerabilities and possible problems and considerations in applying SDN to embedded devices in consideration of structural characteristics and real-world discovered cases. This study presents vulnerabilities and possible problems and considerations when applying SDN to embedded devices. From a hardware perspective, we consider the problems of Wi-Fi chips and Bluetooth, the problems of open flow implementation, SDN controllers, and examples of structural properties. SDN separates the data plane and the control plane, and provides a standardized interface between the two, enabling efficient communication control. It can respond to the security limitations of existing network technologies that are difficult to respond to rapid changes.