Secure Storage using Maximally Recoverable Locally Repairable Codes
Abstract
This paper considers data secrecy in distributed storage systems (DSSs) using maximally recoverable locally repairable codes (MR-LRCs). Conventional MR-LRCs are in general not secure against eavesdroppers who can observe the transmitted data during a global repair operation. This work enables nonzero secrecy dimension of DSSs encoded by MR-LRCs through a new repair framework. The key idea is to associate each local group with a central processing unit (CPU), which aggregates and transmits the contribution from the intact nodes of their group to the CPU of a group needing a global repair. The aggregation is enabled by so-called local polynomials that can be generated independently in each group. Two different schemes -- direct repair and forwarded repair -- are considered, and their secrecy dimension using MR-LRCs is derived. Positive secrecy dimension is enabled for several parameter regimes.
Cite
@article{arxiv.2405.06098,
title = {Secure Storage using Maximally Recoverable Locally Repairable Codes},
author = {Tim Janz and Hedongliang Liu and Rawad Bitar and Frank R. Kschischang},
journal= {arXiv preprint arXiv:2405.06098},
year = {2024}
}