• Journal of Digital Convergence
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• v.20 no.2
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• pp.261-268
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• 2022

Recently, the number of elderly living alone suffering from loneliness and depression is also increasing significantly due to the rapid aging of the population and nuclear families. In this paper, we propose a smart aging system that increases life satisfaction by providing the elderly with the optimal service tailored to the elderly with the help of IT according to their residential environment and health status. It is possible to provide an advanced customized support system for the elderly by fully utilizing IoT, AI, and Metaverse techniques not only for the elderly who want to live an active life in society but also for the elderly who need care in a nursing hospital. The proposed system provides human satisfaction by providing social connection in real space and virtual space in accordance with the residential environment and health status to the elderly suffering from loneliness in hospital (hospital care) facilities and at home. This paper proposes a new path for future-oriented welfare policy for the elderly by providing a user-customized smart aging system by combining AI and Metaverse technology with a rapidly changing social environment.

• Annual Conference of KIPS
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• 2016.10a
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• pp.214-215
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• 2016

기존 전력망과 최신 IT기술의 융합을 통해 탄생한 차세대 전력망인 스마트그리드의 확산이 본격화됨에 따라 스마트그리드 환경 하에서 동작하는 단말기기, 운영시스템 간 보안통신에 대한 요구사항이 급증하고 있으며, 관련 연구도 활발히 진행 중에 있다. 적법한 인증과정을 거친 인가된 기기와 서버 간 안전한 통신환경 구축을 위해서는 PKI 기반의 기기 보안인증 기술의 적용이 필수적이다. 본 논문에서는 스마트 기기 간 PKI 기반의 기기 보안인증 통신을 위해 스마트 기기용 암호화 키를 안전하게 생성, 관리 및 주입하는 방법에 대해 제시한다. 제시된 방법은 스마트 기기에 대한 안전한 키 관리 및 주입은 물론, 모바일 장비를 활용한 이동식 키주입 방법을 지원함으로써 스마트 기기의 암호화키 노출 등 해킹사고 발생 시 장비교체에 따른 전력서비스 공백을 최소화 할 수 있다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2008.06a
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• pp.193-197
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• 2008

인터넷 사용이 보편화되어 감에 따라 기업의 정보 시스템이 인터넷 기반의 인트라넷 익스트라넷 시스템으로 구축되어 가고 있으며 인터넷 환경에서의 기업과 소비자간 또는 기업과 기업간의 전자거래 관련 응용 프로그램의 개발이 다양해지고 있다. 기업간의 전자 거래에 있어서 정보의 공유 또는 교환의 필수 요소는 공유 또는 교환되어지는 데이터의 형태가 표준화되어 추가적인 데이터의 가공 또는 변환 과정을 거치지 않고 사용할 수 있도록 제공되어져야 한다, 본 논문에서는 인터넷, 인트라넷 등에서 데이터와 포맷 두 가지 모두를 공유하려고 할 때 유용한 방법으로 보편적인 문서의 표준이 되고 있는 XML을 기반으로 하며 기업간의 정보 공유 또는 교환이 이루어 질 수 있는 구매 입찰 조달 시스템 등의 전자상거래 구축에 응용 가능한 작업관리 시스템을 제안한다. 본 논문에서 제안하는 작업관리 시스템은 XML을 기반으로 하여 문서의 표준화가 이루어지며 플랫폼 독립적인 포맷을 제공하여 특정 제품에 관련된 특정 환경의 제약을 받지 않고 사용가능 한 특징을 갖는다.

• Annual Conference of KIPS
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• 2012.04a
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• pp.840-842
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• 2012

오늘날의 정보통신 환경은 유비쿼터스 IT기술의 시대로 진입하고 있다. 유비쿼터스는 사용자가 컴퓨터나 네트워크를 의식하지 않은 상태에서 시간과 장소에 구애받지 않고 자유롭게 네트워크에 접속 할 수 있는 정보와 환경을 의미한다. u-Health(Ubiquitous-Health)는 의료 및 국민 복지에서 떠오르는 분야이며 기존의 의료서비스와는 달리 사용자가 간편하고 언제 어디서나 사용될 수 있는 시스템이다. 기존 u-Health 시스템은 사용자가 착용한 센서로부터 신체 데이터를 제공받고, 제공 받은 데이터로 사용자가 현재 어떠한 상태인지를 파악한다. 그러나 센서로부터 제공받은 신체데이터는 무선통신으로 인한 데이터의 손실 및 오류가 발생하게 된다. 이러한 단점을 극복하고 정확한 환자의 상태를 판단하기 위한 방법으로 온톨로지 기반의 상황인식을 적용하여 기존의 u-Health 시스템 보다 더욱 신뢰성 있는 u-Health 시스템을 구축하고자 한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.3B
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• pp.207-215
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• 2006

It has known that the handover based on MIP in mobile environments has many constraints for proving seamless service due to well hon problems. Although there has been researching for the solutions, such as MRSVP and HMRSVP etc, it is difficult to do the research related with QoS due to the issues based on MIP used as a seamless mobility. In this paper, the seamless provides in a mobility based on SCTP, which is applied by IntServ for end-to-end QoS service. The paper also proposes the path management scheme for saving reservation cost. the scheme searches a new path on the moving mobile terminal and reserves the resources on the path for providing seamless QoS service. The paper is also analyzed on the comparition between a SCTP based and MIP based solutions. the scheme is evaluated using the cost effect saved for resource reservation.

• Journal of KIISE
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• v.44 no.11
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• pp.1219-1230
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• 2017

Real-time streaming services over the Internet have increased with the explosive growth of the various mobile platforms, with a focus on smart phones, and the demand for them is growing. In addition, the bandwidth occupied by the streaming services over the Internet had already surpassed 50% in 2010. Because of the shortage of network bandwidth for multimedia services traffic, restrictions on quality and capacity will become more and more serious. CCN is a future Internet architecture that improves how existing host-based Internet architecture handles content-oriented structure, but it is designed for the transmission of general contents and is not suitable for transmitting real-time streaming contents. In this paper, we focus on the inefficient aspects of CCN and propose a hierarchical grade-based scheme for real-time service for a more efficient environment in real-time streaming services. Experiments have shown better performance in terms of bandwidth, network load, and reliability.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.33 no.3
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• pp.487-498
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• 2023

Security incidents using vulnerabilities in cloud services occur, but it is difficult to collect and analyze traces of incidents in cloud environments with complex and diverse service models. As a result, the importance of cloud forensics research has emerged, and infringement response scenarios must be designed from the perspective of cloud service users (CSUs) and cloud service providers (CSPs) based on representative security threat cases in the public cloud service model. This simulated hacking-based proactive cloud infringement response framework can be used to respond to the cloud service critical resource attack process from the viewpoint of vulnerability detection before cyberattacks occur on the cloud, and can also be expected for data acquisition. Therefore, in this paper, we propose a framework for preventive cloud infringement based on simulated hacking by analyzing and utilizing Cloudfox, a cloud penetration test tool.

• Journal of KIISE:Computing Practices and Letters
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• v.15 no.9
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• pp.649-660
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• 2009

To deliver services suitable to user's situation in the ubiquitous environment, the researches on realizing new services by combining existing ones have been continuously increased. But, it is difficult to provide the personalized services to each user located in the ubiquitous service space where multiple users coexist. In this paper, we propose a service composition model based on user-centered service scenarios and a system for providing personalized services through finding services suitable to user's situation and combining them. The proposed system supports a simple service discovery protocol for finding services from heterogeneous smart objects with limited computing power in the ubiquitous environment. The system aggregates and stores various service scenarios and data derived from users and executes the appropriate services for users. We design and implement a prototype system for the mobile personal device.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.457-460
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• 2007

Recently, Network companies have introduced security solutions to protect the network from intrusions, attacks and viruses but the network has still weakness and vulnerability. It is time to bring more stable and reliable authentication system that would meet the Internet user's need. In this study, Current broadband networks don't have hierarchic and stable authentication solutions. And so, an integrated and hierarchic system is needed to provide a various kinds of application services.

• The Journal of the Korea Contents Association
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• v.7 no.11
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• pp.130-139
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• 2007

As increasing the usefulness of wireless communication, there are developing the environment of ubiquitous that is combined the network of wireless and wire communication combinate type in various filed and in this network environment, u-campus constructions, based on ubiquitous sensor network, is developing. u-Campus is the new type campus which applies to ubiquitous computer technology and wireless network one. at this thesis, it is designed u-campus construction using zigbee technology with u-campus basic technology. u-Campus service, being subject to zigbee wireless communication skills, presents the members an convenient service using zigbee network.