Computer Science – Operating Systems
Scientific paper
2008-03-16
Fourth International IEEE Security in Storage Workshop, 2007 - SISW '07. Publication Date: 27-27 Sept. 2007 On page(s): 34-45
Computer Science
Operating Systems
11pt, 12 pages, 16 figures
Scientific paper
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.
Gopinath K.
Narayan Ganesh
Sriram V.
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