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arXiv · 1712.03326

Multilevel Diversity Coding with Secure Regeneration: Separate Coding Achieves the MBR Point

Shuo Shao·Tie Liu·Chao Tian·Cong Shen
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Abstract

The problem of multilevel diversity coding with secure regeneration (MDC-SR) is considered, which includes the problems of multilevel diversity coding with regeneration (MDC-R) and secure regenerating code (SRC) as special cases. Two outer bounds are established, showing that separate coding of different messages using the respective SRCs can achieve the minimum-bandwidth-regeneration (MBR) point of the achievable normalized storage-capacity repair-bandwidth tradeoff regions for the general MDC-SR problem. The core of the new converse results is an exchange lemma, which can be established using Han's subset inequality.

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Shuo Shao, Tie Liu, Chao Tian, Cong Shen. 2017-12-09. Multilevel Diversity Coding with Secure Regeneration: Separate Coding Achieves the MBR Point. https://doi.org/10.3390/e20100751

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