• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제7권4호
• /
• pp.860-877
• /
• 2013

Cloud computing has become one of the most important technologies for reducing cost and increasing productivity by efficiently using IT resources in various companies. The cloud computing system has mainly been built for private enterprise, but public institutions, such as governments and national institutes, also plans to introduce the system in Korea. Various researches have pointed to security problems as a critical factor to impede the vitalization of cloud computing services, but they only focus on the security threats and their correspondents for addressing the problems. There are no studies that analyze major security issues with regard to introducing the cloud computing system. Accordingly, it is necessary to research the security factors in the cloud computing given to public institutions when adopting cloud computing. This research focuses on the priority of security solutions for the stepwise adoption of cloud computing services in enterprise environments. The cloud computing security area is classified into managerial, physical and technical area in the research, and then derives the detailed factors in each security area. The research derives the influence of security priorities in each area on the importance of security issues according to the identification of workers in private enterprise and public institutions. Ordered probit models are used to analyze the influences and marginal effects of awareness for security importance in each area on the scale of security priority. The results show workers in public institutions regard the technical security as the highest importance, while physical and managerial security are considered as the critical security factors in private enterprise. In addition, the results show workers in public institutions and private enterprise have remarkable differences of awareness for cloud computing security. This research compared the difference in recognition for the security priority in three areas between workers in private enterprise, which use cloud computing services, and workers in public institutions that have never used the services. It contributes to the establishment of strategies, with respect to security, by providing guidelines to enterprise or institutions that want to introduce cloud computing systems.

• Journal of Communications and Networks
• /
• 제16권6호
• /
• pp.592-599
• /
• 2014

Cloud computing enables users to easily store their data and simply share data with others. Due to the security threats in an untrusted cloud, users are recommended to compute verification metadata, such as signatures, on their data to protect the integrity. Many mechanisms have been proposed to allow a public verifier to efficiently audit cloud data integrity without receiving the entire data from the cloud. However, to the best of our knowledge, none of them has considered about the efficiency of public verification on multi-owner data, where each block in data is signed by multiple owners. In this paper, we propose a novel public verification mechanism to audit the integrity of multi-owner data in an untrusted cloud by taking the advantage of multisignatures. With our mechanism, the verification time and storage overhead of signatures on multi-owner data in the cloud are independent with the number of owners. In addition, we demonstrate the security of our scheme with rigorous proofs. Compared to the straightforward extension of previous mechanisms, our mechanism shows a better performance in experiments.

• 한국IT서비스학회지
• /
• 제11권3호
• /
• pp.287-304
• /
• 2012

Cloud computing, which means a new way of deploying information technology(IT) in organizations as a service and charging per use, has a deep impact on organizations' IT accessibility, agility and efficiency of its usage. More than that, the emergence of cloud computing surpasses a mere technological innovation, making business model innovation possible. We call this innovation realized by could computing a cloud business model. This study develops a comprehensive framework of business model, first, and then defines and analyzes the cloud business model through this framework. This study also examines the case of M-Pesa mobile payment as a cloud business model in which a new value creation and profit realization schemes have been realized and industry value network has changed. Finally, this study discusses the business implications from this new business model.

• Journal of information and communication convergence engineering
• /
• 제13권1호
• /
• pp.15-20
• /
• 2015

The limited battery power in the mobile environment, lack of sufficient wireless bandwidth, limited resources of mobile terminals, and frequent breakdowns of the wireless network have become major hurdles in the development of mobile cloud computing (MCC). In order to solve the abovementioned problems, This paper propose a proxy-based MCC framework by adding a proxy server between mobile devices and cloud services to optimize the access to cloud services by mobile devices on the network transmission, application support, and service mode levels. Finally, we verify the effectiveness of the developed framework through an experimental analysis. This framework can ensure that mobile users have efficient access to cloud services.

• 경영정보학연구
• /
• 제19권1호
• /
• pp.75-100
• /
• 2017

오늘날 기업은 급변하는 경영환경의 변화 속에 생존을 위해 끊임없는 변신과 혁신을 추구한다. 그 일환으로, 클라우드 컴퓨팅 서비스의 도입이 사회 전반에 걸쳐 활발하게 진행 중인데, 혁신의 주체로서 기업과 공공부문에 많은 변화와 발전을 유발할 것으로 기대된다. 이미 글로벌 선진국들은 공공 부문뿐만 아니라 많은 기업들이 클라우드 컴퓨팅 서비스를 접목하는 등 적극적으로 활용하고 있다. 이처럼, 클라우드 컴퓨팅 서비스의 중요함을 고려해 볼 때, 그 확산을 위한 연구는 매우 시급하고 중요하다. 로저스에 의하면, 확산이란 하나의 혁신이 시간을 두고 사회체계의 구성원 사이에서 특정 채널을 통해 커뮤니케이션이 되는 과정이다. 혁신을 수용하려는 성향이 혁신성향이고, 이러한 혁신성향은 혁신확산과 관련된 연구 및 새로운 기술이나 아이디어를 확산시키려는 기업에 있어 매우 중요한 가치를 가지게 된다. 본 연구의 목적은 혁신확산이론을 기반으로 클라우드 컴퓨팅 서비스의 특성이 혁신성향에 따라 인지된 기대성과에 미치는 영향요인을 실증 분석하는 것이다. 본 연구 결과는 향후 빅데이타, 디지털 융합, 사물인터넷 등과 같은 신기술의 확산을 위한 모형개발에 크게 기여할 것으로 기대된다.

• 정보보호학회논문지
• /
• 제21권1호
• /
• pp.177-186
• /
• 2011

스마트 폰의 보급이 확장되면서 데스크톱의 성능과 모바일 특성이 적용된 다양한 모바일 서비스가 증가하고 있다. 모바일 서비스는 모바일 단말의 메모리, 컴퓨팅 파워, 저장 공간 부족과 모바일 단말의 플랫폼에 종속되는 한계를 갖는데 이를 극복할 수 있는 클라우드 컴퓨팅 서비스가 적용된 모바일 클라우드 컴퓨팅 서비스가 최근 각광받고 있다. 모바일 클라우드 서비스는 모바일 서비스와 무선네트워크, 클라우드 서비스가 융합된 서비스로 다양하고 확장된 서비스를 제공하지만, 보안 위협요소가 복합적으로 상속되는 위험이 잠재되어 있다. 그러므로 보안위협이 제거된 안전한 서비스를 배포하고 위협 발생 시 적절하게 대응하기 위한 방안이 필요하다. 본 연구에서는 모바일 단말, 무선네트워크, 클라우드 컴퓨팅 서비스의 위협을 분석하여 모바일 클라우드 서비스의 위협과 위협에 대응하기 위한 방안을 정의하였으며, 위협시나리오를 기반으로 잠재된 위협을 예상하고 대응할 수 있는 방안을 제시하였다.

• 한국IT서비스학회지
• /
• 제13권4호
• /
• pp.309-324
• /
• 2014

This case study focuses on the preparing a guide for the plan to the companies that want to build a business document system for the centralized services under the cloud computing. Total 3 Operating companies with regard to cloud computing issues are introduced for this purpose. Analyzing the usage and development direction of the selected companies were performed to set up plans. Through this in-depth needs of the user's point of view for the management of business documents, The necessary improvements in the process of collaboration and document sharing were derived. Business documents centralized service plans were proposed based on cloud computing models. Practical experiences of the companies were helpful to present the details of the operational strategy and operational plans. Especially with minimal staff input and verification process, Sample method for the automatic generating of the new document file name is introduced. A test bed before operating the enterprise-wide system were presented with information that is to be considered when building systems.

• 한국정보통신학회:학술대회논문집
• /
• 한국정보통신학회 2016년도 춘계학술대회
• /
• pp.235-238
• /
• 2016

With the vision of Internet of Things (IoT), physical world itself is becoming a connected information system on the Internet and cyber world is computing as a physical act to sense and respond to real-world events collaboratively. The systems that tightly interlink the cyber and physical worlds are often referred to as Smart Systems or Cyber-Physical Systems. Smart IoT Clouds aim to provide a cyber-physical infrastructure for utility (pay-as-you-go) computing to easily and rapidly build, modify and provision auto-scale smart systems that continuously monitor and collect data about real-world events and automatically control their environment. Developing specifications for service interoperability is critical to enable to achieve this vision. In this paper, we bring an issue to extend Open Cloud Computing Interface for uniform, interoperable interfaces for Smart IoT Cloud Services to access services and build a smart system through orchestrating the cloud services.

• 한국멀티미디어학회논문지
• /
• 제20권8호
• /
• pp.1456-1463
• /
• 2017

In recent times, IaaS (Infrastructure as a Services) have been rapidly evolving to allow developers to easily and efficiently access work in the server and network areas for development of a web of App based on cloud computing. In this study, we developed the collaborative image editing tool App based on Cloud-computing, by adopting AWS of representative company that develops IaaS. First, it is crucial to understand various situation conditions for representative infrastructure services: AWS, Azure and Google (GCP). This may have the effect of reducing manpower and development time, but as each company has different policy and technical support, we need a new study every time the environment changes of infrastructure services. We tried to develop a hybrid-App so that users with various devices can collaborate work each other by utilizing the infrastructure service AWS through the process of developing the image editing authoring tool based on the cloud computing. The future studies should continue about compatibility issues and support issues in order to minimize the problems of overseas infrastructure services, but we think that domestic cloud computing policies and developments should be urgently considered.

• 디지털융복합연구
• /
• 제18권12호
• /
• pp.105-115
• /
• 2020

본 연구는 클라우드 컴퓨팅 서비스의 혁신저항에 영향을 주는 요인을 알아보고, 국내 클라우드 컴퓨팅 서비스 사용을 높이기 위한 정책적 대안을 제시하는데 목적이 있다. 이를 위해 정부지원을 받아 클라우드 컴퓨팅 서비스를 도입한 중소기업 178개사를 설문조사하였다. 그 결과, 테크노스트레스, CEO 정보화 리더십과 조직구조 집권성은 혁신저항에 유의미한 영향을 미쳤다. 따라서 향후에는 첫째, 테크노스트레스를 줄일 수 있는 방향으로 이용자 중심의 클라우드 컴퓨팅 서비스 제공이 필요하다. 둘째, 중소기업별 조직특성에 대한 보다 심도 있는 이해를 통한 클라우드 컴퓨팅 서비스의 적용이 필요하다. 셋째, 보안인증 고도화 및 보상제도가 필요하다. 클라우드 컴퓨팅 서비스 이용을 촉진하기 위해서는 이용자가 안전하게 이용할 수 있는 환경이 우선적으로 마련되어야 할 것이다.