Secure Fractional Repetition Codes for Distributed Storage Systems
Zhihang Deng, Bing Zhu, Kenneth W. Shum, Weiping Wang · 2023
Fractional Repetition (FR) codes are a class of exact-repair regenerating codes known for their ability to minimize repair bandwidth and provide uncoded repair capability. However, the table-based repair mechanism employed by FR codes brings both advantages and challenges. While it enables FR codes to exceed the storage-bandwidth trade-off, it also exposes them to potential information leakage and makes traditional security methods less effective. In this paper, we address the issue of securing FR codes against eavesdroppers who can access the content of a subset of storage nodes. To mitigate the risk of information leakage, we propose a novel code construction that enhances the security of FR codes in a flexible manner.