Paper 2008/489 Original: eprint.iacr.org/2008/489 ↗
HAIL: A High-Availability and Integrity Layer for Cloud Storage
Abstract
We introduce HAIL (High-Availability and Integrity Layer), a distributed cryptographic system that permits a set of servers to prove to a client that a stored file is intact and retrievable. HAIL strengthens, formally unifies, and streamlines distinct approaches from the cryptographic and distributed-systems communities. Proofs in HAIL are efficiently computable by servers and highly compact---typically tens or hundreds of bytes, irrespective of file size. HAIL cryptographically verifies and reactively reallocates file shares. It is robust against an active, mobile adversary, i.e., one that may progressively corrupt the full set of servers. We propose a strong, formal adversarial model for HAIL, and rigorous analysis and parameter choices. We show how HAIL improves on the security and efficiency of existing tools, like Proofs of Retrievability (PORs) deployed on individual servers. We also report on a prototype implementation.
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2009-04-20: last updated
- 2008-11-21: published
- Short URL
- https://ia.cr/2008/489
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2008/489,
author = {Kevin D. Bowers and Ari Juels and Alina Oprea},
title = {HAIL: A High-Availability and Integrity Layer for Cloud Storage},
howpublished = {Cryptology {ePrint} Archive, Paper 2008/489},
year = {2008},
url = {https://eprint.iacr.org/2008/489}
}