Tresorium: Cryptographic file system for dynamic groups over untrusted cloud storage

István Lám, Szilveszter Szebeni, Levente Buttyán

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Citations (Scopus)

Abstract

In this paper, we present Tresorium, a cryptographic file system designed for cloud based data storage. In Tresorium, files are encrypted before they are uploaded to the cloud storage providers, therefore, not even the cloud storage providers can access the users' data. Yet, Tresorium allows the sharing files within a group of users by using an underlying group key agreement protocol. A key feature of Tresorium is that it handles changes in group membership and modification of files in an extremely efficient manner, thanks to the usage of so called key-lock-boxes and a lazy re-encryption approach. Finally, Tresorium supports an ACL-like abstraction, so it is easy to use. We describe Tresorium, and analyze its security and performance. We also present some simulation results that clearly show the efficiency of the proposed system.

Original languageEnglish
Title of host publicationProceedings - 41st International Conference on Parallel Processing Workshops, ICPPW 2012
Pages296-303
Number of pages8
DOIs
Publication statusPublished - Dec 20 2012
Event41st International Conference on Parallel Processing Workshops, ICPPW 2012 - Pittsburgh, PA, United States
Duration: Sep 10 2012Sep 13 2012

Publication series

NameProceedings of the International Conference on Parallel Processing Workshops
ISSN (Print)1530-2016

Other

Other41st International Conference on Parallel Processing Workshops, ICPPW 2012
CountryUnited States
CityPittsburgh, PA
Period9/10/129/13/12

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Keywords

  • Collaborative work
  • Cryptographic File System
  • Dynamic Groups
  • Untrusted Cloud

ASJC Scopus subject areas

  • Software
  • Mathematics(all)
  • Hardware and Architecture

Cite this

Lám, I., Szebeni, S., & Buttyán, L. (2012). Tresorium: Cryptographic file system for dynamic groups over untrusted cloud storage. In Proceedings - 41st International Conference on Parallel Processing Workshops, ICPPW 2012 (pp. 296-303). [6337494] (Proceedings of the International Conference on Parallel Processing Workshops). https://doi.org/10.1109/ICPPW.2012.44