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TR18-109 | 29th May 2018
Kasper Green Larsen, Jesper Buus Nielsen

Yes, There is an Oblivious RAM Lower Bound!

An Oblivious RAM (ORAM) introduced by Goldreich and Ostrovsky
[JACM'96] is a (possibly randomized) RAM, for which the memory access
pattern reveals no information about the operations
performed. The main performance metric of an ORAM is the bandwidth
overhead, i.e., the multiplicative factor extra memory blocks that must be
accessed ... more >>>




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