Do you know where your cloud files are?

Karyn Benson, Rafael Dowsley, Hovav Shacham

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

48 Citations (Scopus)

Abstract

Clients of storage-as-a-service systems such as Amazon's S3 want to be sure that the files they have entrusted to the cloud are available now and will be available in the future. Using protocols from previous work on proofs of retriev-ability and on provable data possession, clients can verify that their files are available now. But these protocols do not guarantee that the files are replicated onto multiple drives or multiple datacenters. Such tests are crucial if cloud storage is to provide resilience to natural disasters and power outages as well as improving the network latency to different parts of the world. In this paper, we study the problem of verifying that a cloud storage provider replicates the data in diverse geolo-cations. We provide a theoretical framework for verifying this property. Our model accurately determines which Amazon CloudFront location serves content for Planetlab nodes across the continental US. Our work is complementary to the recent paper of Bowers et al., which uses different techniques to verify that files are replicated across multiple drives in a single datacenter.

Original languageEnglish
Title of host publicationCCSW'11 - Proceedings of the 3rd ACM Workshop on Cloud Computing Security Workshop
PublisherAssociation for Computing Machinery (ACM)
Pages73-82
Number of pages10
ISBN (Print)9781450310048
DOIs
Publication statusPublished - 2011
Externally publishedYes
Event3rd ACM Workshop on Cloud Computing Security Workshop, CCSW'11, Co-located with the 18th ACM Conference on Computer and Communications Security, CCS 2011 - Chicago, United States of America
Duration: 21 Oct 201121 Oct 2011

Publication series

NameProceedings of the ACM Conference on Computer and Communications Security
ISSN (Print)1543-7221

Conference

Conference3rd ACM Workshop on Cloud Computing Security Workshop, CCSW'11, Co-located with the 18th ACM Conference on Computer and Communications Security, CCS 2011
CountryUnited States of America
CityChicago
Period21/10/1121/10/11

Keywords

  • Cloud computing
  • Geolocation

Cite this

Benson, K., Dowsley, R., & Shacham, H. (2011). Do you know where your cloud files are? In CCSW'11 - Proceedings of the 3rd ACM Workshop on Cloud Computing Security Workshop (pp. 73-82). (Proceedings of the ACM Conference on Computer and Communications Security). Association for Computing Machinery (ACM). https://doi.org/10.1145/2046660.2046677