[PDF] Top 20 PRO-ORAM: Constant Latency Read-Only Oblivious RAM

... any ORAM scheme comes from the shuffling step. In square-root ORAM, the shuffling step is strictly performed after the access step ...for read-only applications, the algo- rithm need not wait ... See full document

... write-only ORAM schemes and one multi-server write-only ORAM scheme have been proposed to hide the write pattern on honest but curious outsourced ...both read and write patterns, PIR is ... See full document

... Path ORAM (for more details, see [27]). Path ORAM follows the tree-based ORAM paradigm [23] where server storage is structured as a binary tree of roughly log N ...Path ORAM algorithm first ... See full document

... using ORAM as a build- ing ...write-only ORAM, we have then introduced a novel construction of a write-only ORAM which achieves optimal O(1) communication ...our ORAM can be ... See full document

... tree-based ORAM schemes, this problem only manifests when CPUs access exactly the same item, otherwise items are associated with independent leaf nodes, and there are no bad ...an oblivious ... See full document

... of ORAM. Oblivious RAM (ORAM), initially defined by Goldreich and Ostrovsky [13], allows a client to outsource her memory to a remote server while allowing the client to perform random-access ... See full document

... Oblivious RAM (ORAM), introduced by Goldreich and Os- trovsky [10], [11], is a cryptographic primitive that completely eliminates the information leakage from a program’s memory access trace, ... See full document

... will read into memory all O(1) of its local registers, perform the dictated local computation, and write the updated state back to memory, where the resulting Read/Write request information is written in a ... See full document

... be constant in the number of ...with only a constant number of transferred blocks as ...a constant communica- tion ORAM for blocks in Ω(log 5 ...Onion ORAM from logN to ... See full document

... the oblivious structure in each ...to oblivious sorting that resulted in a O(log 2 N )-overhead ...hierarchical ORAM constructions and made explicit the notion of an oblivious hash table in ... See full document

... (larger) RAM stored on a server, where the access pattern is observed by the ...standard RAM model can be transformed using an ”obliv- ious RAM simulator” into a program for the oblivious ... See full document

... the read overhead of general ORAM schemes beyond the “balls and bins” model and in the online ...consider read-only ORAM schemes that only support reads – but not writes – to the ... See full document

... improve ORAM online bandwidth, but its overall bandwidth blowup is still ...with constant ciphertext expansion, one can construct an ORAM scheme with constant bandwidth ...perform ORAM ... See full document

... are secure pseudorandom functions. Then, the ORAM scheme described in this section satisfies semi-honest security (i.e., replace Definition 2 of Appendix B with a semi-honest adversary). Proof. Based on the set of ... See full document

... this pseudorandom function is hardwired in each CPU step so that it first decrypts the ciphertext that is read from the memory and uses the underlying data for further processing. This approach to solving ... See full document

... bandwidth-efficient oblivious access techniques including multi-server PIR and Write-Only ORAM, ODSE achieves a high security with the following asymptotic ...generic ORAM to access the DSSE ... See full document

... the oblivious counterpart must complete within X ·T time also consuming m ...the oblivious simulation can benefit from the additional parallelism and be additionally sped up by asymptotic ...and only ... See full document

... Our scoram is another tree-based ORAM with a novel Eviction algorithm. Overall, Eviction will perform flush() (Algorithm 1) α times. In our implementation, we choose α = 4 which we determine to be the optimal ... See full document

... of only O(N ) items at the ...of only log N k = log log N N = log N − log log N , while the buckets size is still O(log N ...a constant client memory, the server storage is O(N ) and the ... See full document

... by read-once, oblivious, branching programs that is closed under restrictions and decompositions and satisfies L k ( f ) ≤ poly(n) · c k for every k and f ∈ C , there is a pseudorandom generator with seed ... See full document