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IEEE Final Year Project Topics for CSE

Base Paper Title

Achieving Maximum Distance Separable Private Information Retrieval Capacity With Linear Codes

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IEEE Project Abstract

We propose three private information retrieval (PIR) protocols for distributed storage systems (DSSs) where datais stored using an arbitrary linear code. The first two protocols,named Protocol 1 and Protocol 2, achieve privacy for the scenario with non colluding nodes. Protocol 1 requires a file size that is exponential in the number of files in the system, while Protocol 2 requires a file size that is independent of the number of files and is hence simpler. We prove that, for certain linear codes, Protocol 1 achieves the maximum distance separable (MDS) PIR capacity,i.e., the maximum PIR rate (the ratio of the amount of retrieved stored data per unit of downloaded data) for a DSS that uses an MDS code to store any given (finite and infinite) number of files, and Protocol 2 achieves the asymptotic MDS-PIR capacity(with infinitely large number of files in the DSS). In particular,we provide a necessary and a sufficient condition for a codeto achieve the MDS-PIR capacity with Protocols 1 and 2 andprove that cyclic codes, Reed-Muller (RM) codes, and a classof distance-optimal local reconstruction codes achieve both the finite MDS-PIR capacity (i.e., with any given number of files)and the asymptotic MDS-PIR capacity with Protocols 1 and 2,respectively. Furthermore, we present a third protocol, Protocol 3,for the scenario with multiple colluding nodes, which can be seen as an improvement of a protocol recently introduced by Freij-Hollanti et al.. Similar to the non colluding case, we provide a necessary and a sufficient condition to achieve the maximum possible PIR rate of Protocol 3. Moreover, we provide a particular class of codes that is suitable for this protocol and show that RM codes achieve the maximum possible PIR rate for the protocol.For all three protocols, we present an algorithm to optimize their PIR rates.

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