/lp/association-for-computing-machinery/hail-a-high-availability-and-integrity-layer-for-cloud-storage-peM4XIJCnn
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- Datasource
- Association for Computing Machinery
- Copyright
- The ACM Portal is published by the Association for Computing Machinery. Copyright © 2010 ACM, Inc.
- ISBN
- 978-1-60558-894-0
- doi
- 10.1145/1653662.1653686
- Publisher site
- See Article on Publisher Site
Abstract
HAIL: A High-Availability and Integrity Layer for Cloud Storage Kevin D. Bowers RSA Laboratories Cambridge, MA, USA Ari Juels RSA Laboratories Cambridge, MA, USA Alina Oprea RSA Laboratories Cambridge, MA, USA kbowers@rsa.com ABSTRACT ajuels@rsa.com aoprea@rsa.com We introduce HAIL (High-Availability and Integrity Layer), a distributed cryptographic system that allows a set of servers to prove to a client that a stored le is intact and retrievable. HAIL strengthens, formally uni es, and streamlines distinct approaches from the cryptographic and distributed-systems communities. Proofs in HAIL are ef ciently computable by servers and highly compact ”typically tens or hundreds of bytes, irrespective of le size. HAIL cryptographically veri es and reactively reallocates le 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 ef ciency of existing tools, like Proofs of Retrievability (PORs) deployed on individual servers. We also report on a prototype implementation. Categories and Subject Descriptors E.3 [Data]: [Data Encryption] General Terms Security Keywords Distributed storage systems, cloud storage, data availability, erasure codes, proofs of