• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.05a
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• pp.277-280
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• 2011

After the concept of Cloud Computing was first introduced, IT industry had focused on it. The Cloud Computing market is increasing as many major coporations have been participating in it. Now, the possibility of Mobile Cloud Computing has rising. Needless to say, the growth of Mobile Cloud Computing is explosive. Mobile industry changes its operational system from FeaturePhone to SmartPhone which are based on iPhone or Android. The number of Smart phone users in Korea exceeds 10 millions. Through this study, we will examine sorts and acctual situations of available domestic and international Mobile Cloud Computing Services in SmartPhone. Also, we will investigate the problems of current Mobile Cloud Computing and present the solutions.

• Journal of Internet Computing and Services
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• v.18 no.1
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• pp.1-9
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• 2017

Innovations from current researches on cloud computing such as applying bio-inspired computing techniques have brought new level solutions in offloading mechanisms. With the growing trend of mobile devices, mobile cloud computing can also benefit from applying bio-inspired techniques. Energy-efficient offloading mechanisms on mobile cloud systems are needed to reduce the total energy consumption but previous works did not consider energy consumption in the decision-making of task distribution. This paper proposes the Particle Swarm Optimization (PSO) as an offloading strategy of cloudlet to data centers where each task is represented as a particle during the process. The collected tasks are classified using K-means clustering on the cloudlet before applying PSO in order to minimize the number of particles and to locate the best data center for a specific task, instead of considering all tasks during the PSO process. Simulation results show that the proposed PSO excels in choosing data centers with respect to energy consumption, while it has accumulated a little more processing time compared to the other approaches.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.23 no.6
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• pp.1277-1286
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• 2013

Cloud computing's unique attributes such as elasticity, rapid provisioning and releasing, resource pooling, multi-tenancy, broad-network accessibility, and ubiquity bring many benefits to cloud adopters(company and organization), but also entails specific security risks associated with the type of adopted cloud and deployment mode. To minimize those types of risk, this paper proposed cloud computing security framework refered to strategic alliance model. The cloud computing security framework has main triangles that are cloud threat, security controls, cloud stakeholders and compose of three sides that are purposefulness, accountability, transparent responsibility. Main triangles define purpose of risk minimization, appointment of stakeholders, security activity for them and three sides of framework are principles of security control in the cloud computing, provide direction of deduction for seven service packages.

• Journal of Convergence for Information Technology
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• v.9 no.9
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• pp.33-37
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• 2019

According to the enforcement of the Cloud Computing Development and User Protection Act, a new paradigm called as Cloud Computing is coming to the fore among public and private domestic enterprises. Therefore, domestic companies should develop SaaS products specialized for the domestic market and try to preempt the IaaS market ahead of global companies. Now we are facing a necessity to combine all the cloud systems in Korean government to operate seamlessly in a harmony. In this paper, we will look at the prospect of future development of related industry through cloud computing concept and G-cloud's cloud management system (G-CMS). G-CMS can be seen as the first system to comprehensively manage heterogeneous Unix virtualization systems. G-CMS can also save costs by managing heterogeneous virtualization systems in data centers.

• Journal of Digital Convergence
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• v.19 no.1
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• pp.77-88
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• 2021

Cloud computing is getting a lot of attention by many people and businesses due to IT environmental changes such as the proliferation of smart devices, the increase of digital data, and the cost of IT resources. More individuals use personal cloud computing services for storing and managing information and data. Therefore, this study proposed determinants that are expected to have an influence on evaluating the value of cloud computing based on the value-based adoption model, examining the relationship between the continuous use intention of cloud computing. Results of the study show that usefulness, convenience of information access, extensibility had a positive impact on perceived value while privacy concerns and costs had a negative impact on perceived value. In addition, perceived value was found to have a significant effect on the intention to continue use of cloud computing. Finally, trust was found to have a significant effect on the perceived value and the intention to continue use of cloud computing. The findings are expected to provide useful information for understanding the factors that individual users consider important in the steadily growing cloud computing market.

• Journal of the Institute of Electronics and Information Engineers
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• v.53 no.8
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• pp.85-92
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• 2016

Mobile cloud computing (MCC) is not just extensions of cloud concepts into mobile environments, but the service technologies that all mobile devices including smartphone can use the desired services by using cloud technology without the constraints of time and space. Currently, a lot of works on mobile cloud computing have been actively researching, whereas user interfaces are not so much researched. The main features and contributions of this paper are as follows. First, develop UI considering UX that is different from conventional interfaces supported by SPICE. Second, combine two button interface into one button interface when keyboard is used in mobile cloud computing clients. Third, develop a mouse interface suitable for mobile cloud computing clients. Fourth, in mobile cloud computing client, solve a problem that the selection of button/files/folder has at the corner. Finally, in mobile cloud computing clients we change mouse scroll mapping functions from volume button to scroll interface in touch-screen. The results of performance evaluation shows that users can input easily with the increased and fixed mouse interface. Since shortcut keys instead of the complex button keys of keyboard are provided, the input with 3-6 steps is reduced into 1 step, which can simply support complex keys and mouse input for users.

• Annual Conference of KIPS
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• 2010.04a
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• pp.238-240
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• 2010

본 논문은 최근 IT 분야에서 각광받는 모바일 클라우드를 모바일 노드와 클라우드의 역할에 따라 3 가지 세대로 분류하고, 각 세대별 특장과 활용 및 고려사항에 대해 고찰하였다. 1 세대는 웹 어플리케이션, 2 세대는 실시간 사진전송 시스템, 3 세대는 IPTV UCC 전송 시스템을 각 세대별 예로 들어 그 특징을 논의하였다.

• Electronics and Telecommunications Trends
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• v.32 no.4
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• pp.57-66
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• 2017

지능 정보 사회의 도래와 함께 클라우드 컴퓨팅은 정보통신기술 전반을 융합하는 주축으로 자리 잡았다. 다양한 클라우드 컴퓨팅 인프라가 새롭게 구축되고 있으며, 새로운 클라우드 서비스들도 끊임없이 쏟아져 나오고 있다. 그러나, 클라우드 환경과 서비스가 다양해질수록, 운용에 대한 복잡성 또한 증가한다. 클라우드 서비스 브로커리지(CSB: Cloud service brokerage) 플랫폼은 사용자에게 다양한 클라우드 서비스에 대한 검색, 배치, 사용 및 관리 환경을 제공하여 통합된 멀티 클라우드의 접점을 제공하는 시스템으로, 복잡한 이종 환경의 서비스에 대하여 단순하고 일관된 사용 환경을 제공함으로써 서비스 생태계를 활성화하는 기술이다. 본고에서는 CSB 플랫폼의 개념과 기술 구조를 설명하고, 기술 동향과 더불어 국내외 표준화 동향에 대해 살펴본다.

• Annual Conference of KIPS
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• 2012.11a
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• pp.931-933
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• 2012

IT기술 및 인터넷의 발전으로 시 공간의 제약 없이 다양한 서비스를 제공받을 수 있는 클라우드 컴퓨팅 기술이 등장하게 되었다. 이로 인해 기존 데이터센터를 가상화 및 클라우드 컴퓨팅 기술과 융합한 클라우드 데이터센터로 전환하여 개인용 클라우드 서비스(Private Cloud Service)나 외부 기업 등에게 아웃소싱 하여 공개형 클라우드 서비스(Public Cloud Service)를 제공하고 있다. 그러나 클라우드 환경은 기존의 IT환경에서 발생한 악성코드를 이용한 데이터 해킹 및 유출과 같은 보안 위협이 존재하며, 새로운 보안 위협들이 발생하고 있다. 따라서 본 논문에서는 안전한 클라우드 데이터센터 구축을 위한 보안요구사항에 대해서 분석한다.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06a
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• pp.239-241
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• 2012

최근 클라우드 서비스 공급자들은 세계적으로 증가하는 고객의 수요에 대응하기 위하여, 다양한 지역에 데이터센터들을 구축하고 시스템의 규모를 확장시키고 있다. 클라우드는 통합된 자원을 이용하기 때문에 부하 분산(load balancing)을 통해서 시스템의 성능 및 안정성을 향상시킬 수 있다. 하지만 지역적으로 분산된 데이터센터들을 운영하는 클라우드 컴퓨팅 환경에서는 자원 부하의 분산과 서비스 응답 속도(service response time) 사이의 상관 관계를 고려할 필요가 있다. 그럼에도 불구하고 대부분의 클라우드 서비스 공급자들은 고정된 최소 서비스 응답 속도를 서비스 수준 협약(SLA: Service-Level Agreements)을 제시하고 있는 현실이다. 이와 같이 SLA에 최소 서비스 응답 속도를 임의로 고정할 경우, 거리차이가 있는 데이터센터(SLA에 명시된 응답 속도 보다 느린 데이터센터)에는 부하가 분산되기 어렵다. 따라서 지역적으로 분산된 데이터센터 환경에서는 응답 속도에 대한 가변 SLA를 적용할 필요가 있다. 본 연구에서는 지역적으로 분산된 데이터센터를 운영하는 클라우드 컴퓨팅 환경에서 가변 응답 속도를 적용하기 위한 방법으로써 서비스 응답 속도와 가격을 고려한 자동화된 SLA 협상 메커니즘을 적용하고 그 유효성을 평가하였다. 시뮬레이션을 이용한 실험 결과를 통해서 SLA 협상을 통한 가변 SLA를 이용하는 방법이 고정된 SLA를 이용하는 방법에 비해서 더 높은 SLA 보장률을 지원하고 클라우드 공급자에게 더 높은 수익을 제공함을 확인하였다.