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FAST '03 Abstract
Data Staging on Untrusted Surrogates
Jason Flinn, Intel Research Pittsburgh and University of Michigan; Shafeeq Sinnamohideen, Niraj Tolia, and M. Satyanaryanan, Intel Research Pittsburgh and Carnegie Mellon University
Abstract
We show how untrusted computers can be used to facilitate
secure mobile data access. We discuss a novel architecture,
data staging, that improves the performance of
distributed file systems running on small, storage-limited
pervasive computing devices. Data staging opportunis-tically
prefetches files and caches them on nearby surrogate
machines. Surrogates are untrusted and unmanaged:
we use end-to-end encryption and secure hashes
to provide privacy and authenticity of data and have designed
our system so that surrogates are as reliable and
easy to manage as possible. Our results show that data
staging reduces average file operation latency for interactive
applications running on the Compaq iPAQ hand-held
by up to 54%.
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