• 한국BIM학회 논문집
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• 제9권4호
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• pp.62-74
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• 2019

Because the existing BIM platform is based on user services, the focus is on the development of SaaS (Software as a Service), which provides business services online. However, since a harbor is a security facility, the harbor BIM platform is preferably provided in a private form, rather than relying on the infrastructure environment provided by external cloud providers. Therefore, this study analyzes and reviews the main functions to be provided as SaaS services of the harbor BIM platform. The goal is to build a cloud-based harbor BIM platform that can provide this service to users. To this end, we built IaaS (Infrastructure as a Service) environment of the harbor BIM platform based on the open source Open Stack and integrate and develop PaaS environment with Open Shift applied with IaaS. We applied the GPU to the harbor BIM platform to verify the performance of the harbor BIM platform, and found that the rendering and loading times are improved. In particular, it is expected to reduce the cost of introduction and provide it as the basic cloud environment of similar BIM platform for infrastructure facilities.

• IEIE Transactions on Smart Processing and Computing
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• 제2권5호
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• pp.282-296
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• 2013

With the emergence of cloud computing, more and more sensitive user data are outsourced to remote storage servers. The privacy of users' access pattern to the data should be protected to prevent un-trusted storage servers from inferring users' private information or launching stealthy attacks. Meanwhile, the privacy protection schemes should be efficient as cloud users often use thin client devices to access the data. In this paper, we propose a lightweight scheme to protect the privacy of data access pattern. Comparing with existing state-of-the-art solutions, our scheme incurs less communication and computational overhead, requires significantly less storage space at the user side, while consuming similar storage space at the server. Rigorous proofs and extensive evaluations have been conducted to show that the proposed scheme can hide the data access pattern effectively in the long run after a reasonable number of accesses have been made.

• International Journal of Internet, Broadcasting and Communication
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• 제10권4호
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• pp.19-24
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• 2018

Recently, people can create small content by themselves and it improved into a form that can be promoted. Also, as active small business owners increase, they produce the content for promotion by themselves without external professional help and they utilize it. This paper studies the method to make Mobile Apps, Mobile Web and homepage services available by automatically generating the mobile based mini content. The automated content creation system suggests the method that small business owners and groups can easily communicate with new people by bringing Single Page Application, hybrid mobile web app, N-Screen based content building, private cloud-based PaaS building technology, P2P network based file sharing and multimedia thread technologies together and creating the content.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 춘계학술대회
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• pp.304-307
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• 2015

Virtualization lacks capabilities for enabling the application to scale efficiently because of new applications components which are raised to be configured on demand. In this paper, we propose an architecture that affords mobile app based on nomadic smartphone using not only mobile cloud computing-cloudlet architecture but also a dedicated platform that relies on using virtual private mobile networks to provide reliable connectivity through Long Term Evolution (LTE) wireless communication. The design architecture lies with how the cloudlet host discovers service and sends out the cloudlet IP and port while locating the user mobile device. We demonstrate the effectiveness of the proposed architecture by implementing an android application responsible of real time analysis by using a vehicle to applications smart phones interface approach that considers the smartphones to act as a remote users which passes driver inputs and delivers outputs from external applications.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2012년도 추계학술발표대회
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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.

• 한국전자거래학회지
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• 제18권3호
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• pp.1-15
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• 2013

새로운 IT 서비스로 관심을 가지고 있다. 그러나 클라우드 컴퓨팅 운영과 관리의 문제 때문에 많은 기업들은 클라우드 컴퓨팅 서비스를 신속하게 그들의 조직에 도입하는데 망설이고 있는 실정이다. 미국, 영국, 그리고 일본과 같은 IT 선진국의 정부에서는 기업의 클라우드 컴퓨팅 도입을 촉진하기 위한 다양한 정부 정책을 소개하고 있다. 우리나라 정부 또한 예외는 아니다. 본 연구에서는 정부 주도형 기술 정책에 있어서 정부의 역할을 탐색하는데 사용할 수 있는 분석 프레임워크를 이용하여 현재 우리나라 정부에서 클라우드 컴퓨팅 확산을 촉진하기 위하여 소개한 정책을 평가 분석하여 보고자 한다. 분석 결과, 우리나라의 클라우드 컴퓨팅 확산을 위한 정책은 서비스 소비자 중심이 아닌 서비스 공급자 중심이고, 민간 중심이 아닌 정부 중심임을 알 수 있었다. 이런 불균형은 우리나라의 빠른 클라우드 컴퓨팅 확산을 방해할 것으로 생각된다.

• 정보보호학회논문지
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• 제24권5호
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• pp.941-949
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• 2014

클라우드 컴퓨팅 서비스는 스마트기기의 보급과 맞물려 편리함을 장점으로 수요가 급격히 증가하고 있다. 시장의 관심을 받으면서 클라우드 컴퓨팅 시스템이 정말로 안전한지에 대한 관심도 높아지고 있는 상황이다. 클라우드 환경의 특성상 서비스 제공자는 데이터를 위탁받는 입장에서 사용자의 개인정보를 유출할 수 있게 되는데, 이러한 문제점을 해결하기 위한 방법으로 완전 동형 암호가 대두되고 있다. 완전 동형 암호는 사용자의 암호화된 데이터를 복호화하지 않고 연산을 가능하게 하는 암호체계이다. 완전 동형 암호를 이용하면 기밀성을 보장하면서 암호문에 대한 키가 없어도 연산을 수행할 수 있기 때문에 클라우드 컴퓨팅 환경에서 발생할 수 있는 보안 위협 요소들을 제거하는데 효과적일 것으로 전망하고 있다. 본 논문에서는 클라우드 컴퓨팅 서비스에서 발생할 수 있는 보안 위협 요소들을 조사하고 이를 해결할 수 있는 완전 동형 암호에 대하여 살펴본다.

• 한국정보시스템학회지:정보시스템연구
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• 제29권4호
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• pp.123-135
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• 2020

Purpose The purpose of this study is to investigate the development process and the effectiveness of the EISS (epidemiological investigation support system), which prevents the spread of infectious diseases like a novel corona virus disease, COVID-19. Design/methodology/approach This study identified the existing epidemiological support system for MERS through prior research and studied the case of the development of a newly developed epidemiological support system based on cloud computing infrastructure for COVID-19 through inter-ministerial collaboration in 2020. Findings The outbreak of COVID-19 drove the Korean Government began the development of the EISS with private companies. This system played a significant role in flattening the spread of infection during several waves in which the number of confirmed cases increased rapidly in Korea, However, we need to be careful in handling confirmed patients' private data affecting their privacy.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2011년도 한국컴퓨터종합학술대회논문집 Vol.38 No.1(A)
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• pp.112-115
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• 2011

Healthcare is one of the biggest industries that consume IT Infrastructure as a necessity. A reliable reach to secure private information is the essential goal. Most of the healthcare organizations either have their own custom solutions developed or third part CRM software tailored to their needs. This culture satisfies the usability internal to the organization but lacks the ability to provide public access to the users or even to take a step ahead and collaborate with like minded institutes for research and potential growth. Emergence of cloud computing has provided us the opportunity to take a step ahead and build applications available to users on a secure platform, with ability to scale the resources depending on the requirements. The effective use of hybrid and community cloud can create rock solid foundations for healthcare IT Infrastructure. These cloud deployment models not only caters the present needs of healthcare IT Infrastructure but also opens the possibilities to build applications and provide secure and reliable access beyond the limits of organizational boundaries.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제12권9호
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• pp.4576-4598
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• 2018

In big data age, flexible and affordable cloud storage service greatly enhances productivity for enterprises and individuals, but spontaneously has their outsourced data susceptible to integrity breaches. Provable Data Possession (PDP) as a critical technology, could enable data owners to efficiently verify cloud data integrity, without downloading entire copy. To address challenging integrity problem on multiple clouds for multiple owners, an identity-based batch PDP scheme was presented in ProvSec 2016, which attempted to eliminate public key certificate management issue and reduce computation overheads in a secure and batch method. In this paper, we firstly demonstrate this scheme is insecure so that any clouds who have outsourced data deleted or modified, could efficiently pass integrity verification, simply by utilizing two arbitrary block-tag pairs of one data owner. Specifically, malicious clouds are able to fabricate integrity proofs by 1) universally forging valid tags and 2) recovering data owners' private keys. Secondly, to enhance the security, we propose an improved scheme to withstand these attacks, and prove its security with CDH assumption under random oracle model. Finally, based on simulations and overheads analysis, our batch scheme demonstrates better efficiency compared to an identity based multi-cloud PDP with single owner effort.