• Title/Summary/Keyword: Cloud Data Sharing

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Data Sharing Scheme based on Attribute Re-Encryption in Cloud Computing (클라우드 환경에서 속성 재암호 기반의 데이터 공유 기법)

  • Kim, Su-Hyun;Lee, Im-Yeong
    • Annual Conference of KIPS
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    • 2015.04a
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    • pp.402-403
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    • 2015
  • 클라우드 컴퓨팅 환경에서는 사용자의 데이터를 수많은 분산서버를 이용하여 데이터를 암호화하여 저장한다. 이러한 클라우드 스토리지에 사용자의 수많은 데이터가 저장됨에 따라 클라우드 스토리지의 신뢰성에 문제가 발생하고 있다. 비신뢰적인 관리자 및 공직자로부터 클라우드 서버에 저장된 사용자의 데이터를 안전하게 저장하기 위한 다양한 암호 기술들이 계속해서 연구되고 있다. 하지만 기존의 데이터 암호 기술들은 클라우드 스토리지 상에서 여러 사용자 간의 데이터 공유 서비스에 적용하기 힘든 단점을 가지고 있다. 따라서 본 논문에서는 비신뢰적인 클라우드 스토리지를 고려하여 속성기반 암호로 암호화된 키를 재암호화하여 다른 사용자와 안전하고 효율적으로 공유할 수 있는 데이터 공유기법을 제안한다.

Safe Data Sharing Scheme in Cloud Computing (클라우드 컴퓨팅 환경에서의 안전한 데이터 공유 기법)

  • Kim, Su-Hyun;Lee, Im-Yeong
    • Annual Conference of KIPS
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    • 2015.10a
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    • pp.722-725
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    • 2015
  • 분산 컴퓨팅 환경에서 다양한 데이터 서비스가 가능해지면서 대용량 데이터의 분산관리가 주요 이슈로 떠오르고 있다. 한편, 대용량 데이터의 다양한 이용 형태로부터 악의적인 공격자나 내부 사용자에 의한 보안 취약성 및 프라이버시 침해가 발생할 수 있다. 민감한 데이터들이 클라우드 서버 내에 저장되어 사용될 때, 외부 공격자나 내부 사용자의 미흡한 관리로 인한 데이터 유출 문제가 발생할 수 있다. 이를 해결하기 위해 데이터에 대한 암호화를 통해 관리가 가능하다. 하지만 기존의 단순한 암호화 방식은 클라우드 환경에 저장된 데이터의 접근 관리에 따른 문제점이 존재한다. 또한, 기존의 데이터 암호 기술들은 클라우드 스토리지 상에서 여러 사용자 간의 데이터 공유 서비스에 적용하기 힘든 단점을 가지고 있다. 따라서 본 논문에서는 속성기반 암호로 암호화된 키를 재암호화하여 다른 사용자와 안전하고 효율적으로 공유할 수 있는 데이터 공유기법을 제안한다.

User data sharing SNS system design using Cloud (클라우드 방식을 이용한 사용자간 자료 공유 SNS 시스템 설계)

  • Lee, Jae-Hwan;Kang, Sung-Mun;Bae, Byoung-Ok;Kim, Young-Gon
    • Annual Conference of KIPS
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    • 2013.05a
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    • pp.941-943
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    • 2013
  • 본 눈문은 스토리지 클라우드 서비스와 소셜 네트워크 서비스가 결합된 시스템을 설계하려고 한다. 최근에 다양한 스토리지 클라우드의 등장과 SNS 인기가 급상승 하고 있지만, 서로 자료를 공유하며 의견을 주고 받는 시스템은 거의 없는 수준이다. 본 논문에서는 학교 및 기업과 같은 인적 네트워크가 필요한 곳에서 원활한 자료 공유와 SNS와 같은 자유로운 의견공유가 효율적으로 되도록 하는 시스템을 설계하려고 한다. 본 시스템을 통해 개인적인 스토리지 클라우드와 SNS를 접목해 사용자 저장 공간을 통해 언제 어디서든 SNS을 통해서 관계된 사용자간의 자유로운 자료 공유를 사용하여 추후 다양한 도메인에서 실용화가 이루어지리라 기대한다.

Future Smart Communication Networks: A Survey of Security issues in Developing a Smart City

  • AlEisa, Hussah N.
    • International Journal of Computer Science & Network Security
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    • v.22 no.2
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    • pp.139-144
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    • 2022
  • The smart cities are evolving constantly and are responsible for the current transformation of cities and countries into a completely connected network of information and technology This interconnected network of a huge number of smart devices is capable of exchanging complex information and provides tremendous support including enhanced quality of life within urban locations. Unfortunately this set-up is vulnerable to security attacks and requires the widespread ubiquitous network to authorize access through privacy and thus offer security in order to ensure civilian participation in a country. The smart network should benefit the individuals of the country by developing potential strategies to protect the smart cities and their participating entities from the unauthorized attacks. Trustworthy data sharing strategies based on the utilization of advanced technology features via smart communication network could solve some issues of privacy and security. This paper presents the challenges and issues related to protection and highlights the important aspects of securing the smart cities and its components. It also presents the role of cloud security for building a secure smart city.

A Secure Scheme for Sharing Secure Data in Public Cloud Environment (공공 클라우드 환경에서 안전한 기밀데이터 공유 방법론)

  • Ha, Byong-Lae;Lee, Seung-Ah;Gho, Gi-Hwan
    • Annual Conference of KIPS
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    • 2011.04a
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    • pp.913-916
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    • 2011
  • 공공 클라우드 컴퓨팅 환경은 대부분 사용자가 직접 데이터를 보유하지 않고 데이터 센터의 논리적으로 분리된 저장 공간에 데이터가 존재하는 환경이기 때문에 데이터의 유효한 보안은 매우 중요하다. 더군다나 데이터 센터 내에 위치한 기밀데이터를 사용자 사이에 공유하고자 하는 경우에 안전한 공유기법이 제공되어야 한다. 본 논문에서는 공공 클라우드 컴퓨팅 환경에서 계약된 신뢰 모델을 기반으로 안전한 기밀 데이터 공유 방법을 제안한다. 공공 클라우드에서 사용자에게 데이터 제어권을 두고, 클라우드 서비스 제공자는 단지 데이터를 저장, 검색, 전송하는 프록시(Proxy) 서버 역할을 하게하여 증가하는 데이터 공유와 협업을 위한 데이터 공유 기법을 제안한다.

Comparative Analysis of ViSCa Platform-based Mobile Payment Service with other Cases (스마트카드 가상화(ViSCa) 플랫폼 기반 모바일 결제 서비스 제안 및 타 사례와의 비교분석)

  • Lee, June-Yeop;Lee, Kyoung-Jun
    • Journal of Intelligence and Information Systems
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    • v.20 no.2
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    • pp.163-178
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    • 2014
  • Following research proposes "Virtualization of Smart Cards (ViSCa)" which is a security system that aims to provide a multi-device platform for the deployment of services that require a strong security protocol, both for the access & authentication and execution of its applications and focuses on analyzing Virtualization of Smart Cards (ViSCa) platform-based mobile payment service by comparing with other similar cases. At the present day, the appearance of new ICT, the diffusion of new user devices (such as smartphones, tablet PC, and so on) and the growth of internet penetration rate are creating many world-shaking services yet in the most of these applications' private information has to be shared, which means that security breaches and illegal access to that information are real threats that have to be solved. Also mobile payment service is, one of the innovative services, has same issues which are real threats for users because mobile payment service sometimes requires user identification, an authentication procedure and confidential data sharing. Thus, an extra layer of security is needed in their communication and execution protocols. The Virtualization of Smart Cards (ViSCa), concept is a holistic approach and centralized management for a security system that pursues to provide a ubiquitous multi-device platform for the arrangement of mobile payment services that demand a powerful security protocol, both for the access & authentication and execution of its applications. In this sense, Virtualization of Smart Cards (ViSCa) offers full interoperability and full access from any user device without any loss of security. The concept prevents possible attacks by third parties, guaranteeing the confidentiality of personal data, bank accounts or private financial information. The Virtualization of Smart Cards (ViSCa) concept is split in two different phases: the execution of the user authentication protocol on the user device and the cloud architecture that executes the secure application. Thus, the secure service access is guaranteed at anytime, anywhere and through any device supporting previously required security mechanisms. The security level is improved by using virtualization technology in the cloud. This virtualization technology is used terminal virtualization to virtualize smart card hardware and thrive to manage virtualized smart cards as a whole, through mobile cloud technology in Virtualization of Smart Cards (ViSCa) platform-based mobile payment service. This entire process is referred to as Smart Card as a Service (SCaaS). Virtualization of Smart Cards (ViSCa) platform-based mobile payment service virtualizes smart card, which is used as payment mean, and loads it in to the mobile cloud. Authentication takes place through application and helps log on to mobile cloud and chooses one of virtualized smart card as a payment method. To decide the scope of the research, which is comparing Virtualization of Smart Cards (ViSCa) platform-based mobile payment service with other similar cases, we categorized the prior researches' mobile payment service groups into distinct feature and service type. Both groups store credit card's data in the mobile device and settle the payment process at the offline market. By the location where the electronic financial transaction information (data) is stored, the groups can be categorized into two main service types. First is "App Method" which loads the data in the server connected to the application. Second "Mobile Card Method" stores its data in the Integrated Circuit (IC) chip, which holds financial transaction data, which is inbuilt in the mobile device secure element (SE). Through prior researches on accept factors of mobile payment service and its market environment, we came up with six key factors of comparative analysis which are economic, generality, security, convenience(ease of use), applicability and efficiency. Within the chosen group, we compared and analyzed the selected cases and Virtualization of Smart Cards (ViSCa) platform-based mobile payment service.

Design and Implementation of Library Information System Using Collective Intelligence and Cloud Computing (집단지성과 클라우드 컴퓨팅을 활용한 도서관 정보시스템 설계 및 구현)

  • Min, Byoung-Won
    • The Journal of the Korea Contents Association
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    • v.11 no.11
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    • pp.49-61
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    • 2011
  • In recent, library is considered as an integrated knowledge convergence center that can respond to various requests about information service of users. Therefor it is necessary to establish a novel information system based on information communications technologies of the era. In other words, it is currently required to develop mobile information service available in portable devices such as smart phones or tablet PCs, and to establish information system reflecting cloud computing, SaaS, Annotation, and Library 2.0 etc. In this paper we design and implement a library information system using collective intelligence and cloud computing. This information system can be adapted for the varieties of mobile service paradigm and abruptly increasing amount of electronic materials. Advantages of this concept model are resource sharing, multi-tenant supporting, configuration, and meta-data supporting etc. In addition it can offer software on-demand type user services. In order to test the performance of our system, we perform an effectiveness analysis and TTA authentication test. The average response time corresponding to variance of data reveals 0.692 seconds which is very good performance in timing effectiveness point of view. And we detect maturity level-3 or 4 authentication in TTA tests such as SaaS maturity, performance, and application programs.

Development of Cloud-based VTS Integration Platform for IVEF Service Implementation (IVEF 서비스 구현을 위한 클라우드 기반 VTS 통합 플랫폼 개발)

  • Yunja Yoo;Dae-Won Kim;Chae-Uk Song;Jung-Jin Lee;Sang-Gil Lee
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.29 no.7
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    • pp.893-901
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    • 2023
  • The International Association Marine Aids to Navigation and Lighthouse Authorities (IALA) proposed guidelines for VTS manual operation in 2016 for safe and efficient operation of ship. The Korea Coast Guard (KCG) established and operated 19 VTS centers in ports and coastal waters across the country by 2022 based on the IALA VTS manual and VTS operator's education and training guidelines. In addition, IALA proposed the Inter-VTS Exchange Format (IVEF) Service recommendation (V-145), a standard for data exchange between VTS, in 2011 for efficient e-Navigation system services and safe and efficient VTS service support by VTS authorities. The IVEF service in a common framework for ship information exchange, and it presents seven basic IVEF service (BISs) models. VTS service providers can provide safer and more efficient VTS services by sharing VTS information on joint area using IVEF standards. Based on the BIS data, interaction, and interfacing models, this paper introduced the development of the cloud-based VTS integration services performed by the KCG and the results of the VTS integration platform test-bed for IVEF service implementation. In addition, the results of establishing a cloud VTS integrated platform test-bed for the implementation of IVEF service and implementing the main functions of IVEF service were presented.

QEMU/KVM Based In-Memory Block Cache Module for Virtualization Environment (가상화 환경을 위한 QEMU/KVM 기반의 인메모리 블록 캐시 모듈 구현)

  • Kim, TaeHoon;Song, KwangHyeok;No, JaeChun;Park, SungSoon
    • Journal of KIISE
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    • v.44 no.10
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    • pp.1005-1018
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    • 2017
  • Recently, virtualization has become an essential component of cloud computing due to its various strengths, including maximizing server resource utilization, easy-to-maintain software, and enhanced data protection. However, since virtualization allows sharing physical resources among the VMs, the system performance can be deteriorated due to device contentions. In this paper, we first investigate the I/O overhead based on the number of VMs on the same server platform and analyze the block I/O process of the KVM hypervisor. We also propose an in-memory block cache mechanism, called QBic, to overcome I/O virtualization latency. QBic is capable of monitoring the block I/O process of the hypervisor and stores the data with a high access frequency in the cache. As a result, QBic provides a fast response for VMs and reduces the I/O contention to physical devices. Finally, we present a performance measurement of QBic to verify its effectiveness.

Exploring the Combined Use of LiDAR and Augmented Reality for Enhanced Vertical and Horizontal Measurements of Structural Frames (골조 수직, 수평 측정작업 시 LiDAR 및 AR 기술 적용방안 제시)

  • Park, Inae;Kim, Sangyong
    • Journal of the Korea Institute of Building Construction
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    • v.23 no.3
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    • pp.273-284
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    • 2023
  • This study is centered on the combined use of LiDAR(Light Detection and Ranging) and AR(Augmented Reality) technologies during vertical and horizontal frame measurements in construction projects. The intention is to enhance the quality control procedure, elevate accuracy, and curtail manual labor along with time expenditure. Present methods for accuracy inspection in frame construction often grapple with reliability concerns due to subjective interpretation and the scope for human error. This research recommends the application of LiDAR and AR technologies to counter these issues and augment the efficiency of the inspection process, along with facilitating the dissemination of results. The suggested technique involves the collection of 3D point cloud data of the frame utilizing LiDAR and leveraging this data for checks on construction accuracy. Furthermore, the inspection outcomes are fed into a BIM (Building Information Modeling) model, and the results are visualized via AR. Upon juxtaposing this methodology with the current approach, it is evident that it offers benefits in terms of objective inspection, speed, precise result sharing, and potential enhancements to the overall quality and productivity of construction projects.