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arXiv · 1702.07498

Secure Clustered Distributed Storage Against Eavesdroppers

Beongjun Choi·Jy-yong Sohn·Sung Whan Yoon·Jaekyun Moon
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Abstract

This paper considers the security issue of practical distributed storage systems (DSSs) which consist of multiple clusters of storage nodes. Noticing that actual storage nodes constituting a DSS are distributed in multiple clusters, two novel eavesdropper models - the node-restricted model and the cluster-restricted model - are suggested which reflect the clustered nature of DSSs. In the node-restricted model, an eavesdropper cannot access the individual nodes, but can eavesdrop incoming/outgoing data for $L_c$ compromised clusters. In the cluster-restricted model, an eavesdropper can access a total of $l$ individual nodes but the number of accessible clusters is limited to $L_c$. We provide an upper bound on the securely storable data for each model, while a specific network coding scheme which achieves the upper bound is obtained for the node-restricted model, given some mild condition on the node storage size.

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Beongjun Choi, Jy-yong Sohn, Sung Whan Yoon, Jaekyun Moon. 2017-02-24. Secure Clustered Distributed Storage Against Eavesdroppers. https://arxiv.org/abs/1702.07498

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