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SAFIUS - A secure and accountable filesystem over untrusted storage

Sriram, V and Narayan, Ganesh and Gopinath, K (2007) SAFIUS - A secure and accountable filesystem over untrusted storage. In: Fourth International IEEE Security in Storage Workshop, 2007 - SISW '07. Publication Date: 27-27 Sept. 2007, September 2007, San Diego, California, USA, pp. 34-45.


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We describe SAFIUS, a secure accountable file system that resides over an untrusted storage. SAFIUS provides strong security guarantees like confidentiality, integrity, prevention from rollback attacks, and accountability. SAFIUS also enables read/write sharing of data and provides the standard UNIX-like interface for applications. To achieve accountability with good performance, it uses asynchronous signatures; to reduce the space required for storing these signatures, a novel signature pruning mechanism is used. SAFIUS has been implemented on a GNU/Linux based system modifying OpenGFS. Preliminary performance studies show that SAFIUS has a tolerable overhead for providing secure storage: while it has an overhead of about 50% of OpenGFS in data intensive workloads (due to the overhead of performing encryption/decryption in software), it is comparable (or better in some cases) to OpenGFS in metadata intensive workloads.

Item Type: Conference Paper
Publisher: IEEE Computer Society Press
Additional Information: Complete publication details not available yet.
Keywords: Operating Systems;Storage Security;Filessytem;Accountability
Department/Centre: Division of Electrical Sciences > Computer Science & Automation
Date Deposited: 27 Mar 2008
Last Modified: 19 Sep 2010 04:43
URI: http://eprints.iisc.ac.in/id/eprint/13501

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