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DepSky: Dependable and Secure Storage in a Cloud-of-Clouds

DepSky: Dependable and Secure Storage in a Cloud-of-Clouds D EP S KY: Dependable and Secure Storage in a Cloud-of-Clouds ´ ALYSSON BESSANI, MIGUEL CORREIA, BRUNO QUARESMA, FERNANDO ANDRE, and PAULO SOUSA, University of Lisbon, Faculty of Sciences The increasing popularity of cloud storage services has lead companies that handle critical data to think about using these services for their storage needs. Medical record databases, large biomedical datasets, historical information about power systems and financial data are some examples of critical data that could be moved to the cloud. However, the reliability and security of data stored in the cloud still remain major concerns. In this work we present DepSky, a system that improves the availability, integrity, and confidentiality of information stored in the cloud through the encryption, encoding, and replication of the data on diverse clouds that form a cloud-of-clouds. We deployed our system using four commercial clouds and used PlanetLab to run clients accessing the service from different countries. We observed that our protocols improved the perceived availability, and in most cases, the access latency, when compared with cloud providers individually. Moreover, the monetary costs of using DepSky in this scenario is at most twice the cost of using a single cloud, which is optimal http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ACM Transactions on Storage (TOS) Association for Computing Machinery

DepSky: Dependable and Secure Storage in a Cloud-of-Clouds

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References (65)

Publisher
Association for Computing Machinery
Copyright
Copyright © 2013 by ACM Inc.
ISSN
1553-3077
DOI
10.1145/2535929
Publisher site
See Article on Publisher Site

Abstract

D EP S KY: Dependable and Secure Storage in a Cloud-of-Clouds ´ ALYSSON BESSANI, MIGUEL CORREIA, BRUNO QUARESMA, FERNANDO ANDRE, and PAULO SOUSA, University of Lisbon, Faculty of Sciences The increasing popularity of cloud storage services has lead companies that handle critical data to think about using these services for their storage needs. Medical record databases, large biomedical datasets, historical information about power systems and financial data are some examples of critical data that could be moved to the cloud. However, the reliability and security of data stored in the cloud still remain major concerns. In this work we present DepSky, a system that improves the availability, integrity, and confidentiality of information stored in the cloud through the encryption, encoding, and replication of the data on diverse clouds that form a cloud-of-clouds. We deployed our system using four commercial clouds and used PlanetLab to run clients accessing the service from different countries. We observed that our protocols improved the perceived availability, and in most cases, the access latency, when compared with cloud providers individually. Moreover, the monetary costs of using DepSky in this scenario is at most twice the cost of using a single cloud, which is optimal

Journal

ACM Transactions on Storage (TOS) – Association for Computing Machinery

Published: Nov 1, 2013

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