Privacy-preserving and Secure Distributed Storage Codes

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Provided by: University of California San Francisco
Topic: Security
Format: PDF
In this paper, the authors present explicit codes for distributed storage that, in the presence of repair dynamics, provide information theoretic privacy and security from passive eavesdroppers and/or malicious adversaries. These codes meet previously derived lower bounds on the resources of storage and bandwidth utilized. This paper turns out to be an instance of a non-multicast network coding problem with nodal-security requirements, and their results show that, surprisingly, the capacity is achieved via scalar linear codes in this instance. An auxiliary result on Private Information Retrieval (PIR) for erasure-coded systems is also presented.
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