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Home » CDStore: Toward Reliable, Secure, and Cost-Efficient Cloud Storage via Convergent Dispersal
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CDStore: Toward Reliable, Secure, and Cost-Efficient Cloud Storage via Convergent Dispersal

Authors: 

Mingqiang Li, Chuan Qin, and Patrick P. C. Lee, The Chinese University of Hong Kong

Abstract: 

We present CDStore, which disperses users’ backup data across multiple clouds and provides a unified multi-cloud storage solution with reliability, security, and cost efficiency guarantees. CDStore builds on an augmented secret sharing scheme called convergent dispersal, which supports deduplication by using deterministic content-derived hashes as inputs to secret sharing. We present the design of CDStore, and in particular, describe how it combines convergent dispersal with two-stage deduplication to achieve both bandwidth and storage savings and be robust against side-channel attacks. We evaluate the performance of our CDStore prototype using real-world workloads on LAN and commercial cloud testbeds. Our cost analysis also demonstrates that CDStore achieves a monetary cost saving of 70% over a baseline cloud storage solution using state-of-the-art secret sharing.

Mingqiang Li, The Chinese University of Hong Kong

Chuan Qin, The Chinese University of Hong Kong

Patrick P. C. Lee, The Chinese University of Hong Kong

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BibTeX
@inproceedings {190515,
author = {Mingqiang Li and Chuan Qin and Patrick P. C. Lee},
title = {{CDStore}: Toward Reliable, Secure, and {Cost-Efficient} Cloud Storage via Convergent Dispersal},
booktitle = {2015 USENIX Annual Technical Conference (USENIX ATC 15)},
year = {2015},
isbn = {978-1-931971-225},
address = {Santa Clara, CA},
pages = {111--124},
url = {https://www.usenix.org/conference/atc15/technical-session/presentation/li-mingqiang},
publisher = {USENIX Association},
month = jul,
}
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