• Information and Communications Magazine
• /
• 제30권3호
• /
• pp.22-28
• /
• 2013

오늘날 미래인터넷 기술의 하나로서 SDN이 클라우드 서비스, 모바일 서비스, 스마트 TV, 빅데이터 및 사물지능통신 등의 새로운 서비스를 제공할 수 있는 개방형 플랫폼으로 주목받고 있다. 본고에서는 이러한 SDN 망을 구축함에 있어서 제어 인터페이스, QoS, 멀티캐스트, 이동성 및 네트워크 보안 측면에서 고려해야 할 사항들을 살펴본다. 기존 네트워크의 근본적인 문제점으로 인해 발생한 복잡성 및 성능 저하 요인들이 SDN의 장점을 활용하여 해결될 수 있으며, 이에 본고에서 제시된 고려 사항들이 큰 역할을 할 것이다.

• Proceedings of the Korean Information Science Society Conference
• /
• 한국정보과학회 2010년도 한국컴퓨터종합학술대회논문집 Vol.37 No.1(A)
• /
• pp.299-300
• /
• 2010

• The Optical Journal
• /
• 통권146호
• /
• pp.23-27
• /
• 2013

스마트폰으로 변화시키는 일상생활과 사회문화의 중심에 디스플레이가 있어, 스마트폰 업체는 시장에서 우위를 점하기 위한 가장 중요한 전략으로 디스플레이를 선택하고 있다. 스마트폰 제품을 구성하는 프로세서, 통신부품, 메모리, GPS 센서 등의 하드웨어와 운영체제 및 응용소프트웨어, 유저 인터페이스 등의 소프트웨어, MEMS, 터치, 음성, 동작 인식 등의 센서 기술이 급속히 발전함에 따라 인터넷 및 멀티미디어 기반에서 클라우드, Exchange 서버 등의 사용자 경험을 중요시하는 모바일 컴퓨터 기반으로 스마트폰의 기술 환경이 급속히 변화하고 있다. 이러한 스마트폰 기술 환경 변화에 대응하기 위한 가장 필수적인 요소는 스마트폰 디스플레이로, 대형화, 초고해상도화, 초슬림화되고 있는 디스플레이가 스마트폰 경쟁의 중심에 있다.

• Journal of Korea Multimedia Society
• /
• 제19권2호
• /
• pp.300-307
• /
• 2016

Cloud computing that provide a elastic computing service is more complex compared to the existing computing systems. Accordingly, it has become increasingly important to maintain the stability and reliability of the computing system. And troubleshooting and real-time monitoring to address these challenges must be performed essentially. For these goals, the handling of the log data is needed, but this task in cloud computing environment may be more difficult compared to the traditional logging system. In addition, there are another challenges in order to have the admissibility of the collected log data in court. In this paper, we design secure logging service that provides the management and reliability of log data in a cloud computing environment and then analyze the proposed system.

• Journal of Korea Multimedia Society
• /
• 제18권8호
• /
• pp.915-924
• /
• 2015

With growing popularity of cloud computing services, users can more easily manage massive amount of data by outsourcing them to the cloud, or more efficiently analyse large amount of data by leveraging IT infrastructure provided by the cloud. This, however, brings the security concerns of sensitive data. To provide data security, it is essential to encrypt sensitive data before uploading it to cloud computing services. Although data encryption helps provide data security, it negatively affects the performance of massive data analytics because it forbids the use of index and mathematical operation on encrypted data. Thus, in this paper, we propose a novel algorithm which enables to efficiently process a large amount of encrypted data. In particular, we propose a novel top-k processing algorithm on the massive amount of encrypted data in the cloud computing environments, and verify the performance of the proposed approach with real data experiments.

• Journal of Korea Multimedia Society
• /
• 제21권8호
• /
• pp.909-916
• /
• 2018

Cloud storage services have many advantages. As a result, the amount of data stored in the storage of the cloud service provider is increasing rapidly. This increase in demand forces cloud storage providers to apply deduplication technology for efficient use of storages. However, deduplication technology has inherent security and privacy concerns. Several schemes have been proposed to solve these problems, but there are still some vulnerabilities to well-known attacks on deduplication techniques. In this paper, we examine some of the existing schemes and analyze their security weaknesses.

• Journal of Korea Multimedia Society
• /
• 제20권6호
• /
• pp.918-926
• /
• 2017

Various types of media services are emerging due to the development of Internet and digital media production and distribution technologies. Various DRM technologies are being developed to prevent illegal copying of media contents and to protect the rights of content creators. There is a problem that the DRM provider and the content service provider must provide services in a mutually dependent manner through individual contracts. In this paper, we propose a cloud-based DRM market system which can be used only by content service providers when necessary for various DRM. The DRM market system is expected to show the effect of service activation for related small and medium sized companies by providing an interface that satisfies the requirements of DRM providers and contents service providers by using multi DRM technology.

• Journal of Korea Multimedia Society
• /
• 제19권8호
• /
• pp.1597-1608
• /
• 2016

Recently, a number of solutions were proposed to address the challenges and issues of vehicular networks. Vehicular Cloud Computing (VCC) is one of the solutions. The vehicular cloud computing is a new hybrid technology that has a remarkable impact on traffic management and road safety by instantly using vehicular resources. In this paper, we study an important vehicular cloud service, content-based delivery, that allows future vehicular cloud applications to store, share and search data totally within the cloud. We design a VCC-based system architecture for efficient sharing of vehicular contents, and propose a Hierarchical Hybrid Content Delivery scheme using Bloom Filter (H2CDBF) for efficient vehicular content delivery in Vehicular Ad-hoc Networks (VANETs). The performance of the proposed H2CDBF is evaluated through an analytical model, and is compared to the proactive content discovery scheme, Bloom-Filter Routing (BFR).

• Proceedings of the Korea Information Processing Society Conference
• /
• 한국정보처리학회 2012년도 추계학술발표대회
• /
• pp.314-316
• /
• 2012

최근 클라우드 서비스를 위한 가상화 서버가 많아 졌다. 사용자 측면에서는 독립적인 환경의 자원을 할당받아 자율성이 보장된 서비스를 구현할 수 있다. 서버 관리적 측면에서 보면 복잡성이 늘어나게 된다. 이를 효율적으로 하기 위해 서버의 정보와 환경설정을 쉽고, 유연하게 할 수 있어야 한다. 전체적인 IT 자원관리 측면에서 독립적으로 운영되는 서버도 관리가 필요하다. 이러한 가상서버와 비가상 서버의 정보 수집, 정보 배포, 관리를 위해 방법으로 멀티에이전트 시스템을 이용하고 중앙집중식 관리를 도메인 단위로 관리하여 부하 분산을 하여 데이터를 처리 할 수 있도록 시스템을 설계한다.

• Journal of Korea Multimedia Society
• /
• 제22권9호
• /
• pp.1091-1107
• /
• 2019

The purpose of this study is to technology impact assessment uncertainties and influences of factors for the coexistence technology in MR and to derive the ripple effect of the target technology in many different application fields. This survey is to evaluate the impact of new technologies on economy, society, culture, ethics and environment in advance and to reflect the results in policy research. As a result, we analyzed the positive and negative impacts predicted by the coexistence technology in MR in edutainment field by word cloud analysis. The purpose of these study is to strengthen the intrinsic intent of technology assessment on the edutainment fields to strengthen positive impacts and minimize adverse impacts by identifying the various factors affecting society when the coexistence technology in MR was commercialized as well as by evaluating the positive and negative impacts from a more balanced view.