Secure untrusted data repository (SUNDR)

  • Authors:
  • Jinyuan Li;Maxwell Krohn;David Mazières;Dennis Shasha

  • Affiliations:
  • NYU Department of Computer Science;MIT CS & AI Lab and NYU Department of Computer Science;NYU Department of Computer Science;NYU Department of Computer Science

  • Venue:
  • OSDI'04 Proceedings of the 6th conference on Symposium on Opearting Systems Design & Implementation - Volume 6
  • Year:
  • 2004

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Abstract

SUNDR is a network file system designed to store data securely on untrusted servers. SUNDR lets clients detect any attempts at unauthorized file modification by malicious server operators or users. SUNDR's protocol achieves a property called fork consistency, which guarantees that clients can detect any integrity or consistency failures as long as they see each other's file modifications. An implementation is described that performs comparably with NFS (sometimes better and sometimes worse), while offering significantly stronger security.