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ObliviStore
ObliviStoreAbstract. We design and build ObliviStore, a high performance,
distributed ORAM-based cloud data store secure in the malicious
model. To the best of our knowledge, ObliviStore is the fastest
ORAM implementation known to date, and is faster by 10X or
more in comparison with the best known ORAM implementation.
ObliviStore achieves high throughput by making I/O operations
asynchronous. Asynchrony introduces security challenges, i.e., we
must prevent information leakage not only through access patterns,
but also through timing of I/O events. We propose various practical
optimizations which are key to achieving high performance, as well
as techniques for a data center to dynamically scale up a distributed
ORAM. We show that with 11 trusted machines (each with a
modern CPU), and 20 Solid State Drives, ObliviStore achieves a
throughput of 31.5MB/s with a block size of 4KB.
2013-05-27
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