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DEPSKY: Dependable and Secure Storage in a Cloud-of-Clouds (2013)
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BibTeX
@MISC{Bessani13depsky:dependable,
author = {Alysson Bessani and Miguel Correia and Bruno Quaresma and Fernando André and Paulo Sousa},
title = { DEPSKY: Dependable and Secure Storage in a Cloud-of-Clouds},
year = {2013}
}
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Abstract
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 on this scenario is at most twice the cost of using a single cloud, which is optimal and seems to be a reasonable cost, given the benefits.
Keyphrases
secure storage critical data storage need cloud storage service commercial cloud historical information financial data access latency monetary cost major concern lead company different country diverse cloud single cloud reasonable cost present depsky cloud provider medical record large biomedical datasets power system perceived availability
