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Modified Security Frame Work for PIR Cloud Computing Environment

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Author(s): J. Sinduja | S. Prathiba

Journal: International Journal of Computer Science and Mobile Computing
ISSN 2320-088X

Volume: 2;
Issue: 4;
Start page: 402;
Date: 2013;
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Keywords: Data Security | Cloud | Secret sharing | Information Dispersal

ABSTRACT
Computational Private Information Retrieval (cPIR) protocols allow a client to retrieve one bitfrom a database, without the server inferring any information about the queried bit. These protocols are toocostly in practice because they invoke complex arithmetic operations for every bit of the database. Ourapproach assumes a disk-based architecture that retrieves one page with a single query. Our results indicatethat pCloud reduces considerably the query response time compared to the traditional client/server model,and has a very low communication overhead. Additionally, it scales well with an increasing number of peers;achieving a linear speedup Data outsourcing is a new paradigm in which a third party provides storageservices. This is more cost effective for the user as there is no need of purchasing expensive hardware andsoftware for data storage. Before data out sourcing can become viable, the data provider needs to guaranteethat the data is secure, be able to execute queries on the data, and the results of the queries must also besecure and not visible to the data provider. Data encryption, Homomorphic Encryption, Secret Sharingalgorithms and Private Information Retrieval (PIR) are the techniques widely used for secure dataoutsourcing. CIA (Confidentiality, Integrity and Availability) are the challenging issues associated with datastorage management with/without data outsourcing. In this paper the performance of two secret sharingalgorithms are compared. The Shamir’s secret sharing algorithm and Rabin’s Information DispersalAlgorithm (IDA) are implemented in a private cloud setup using the Open Stack Cloud framework.
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