[PDF] Top 20 A Simple Recursive Tree Oblivious RAM
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A Simple Recursive Tree Oblivious RAM
... height tree and going over O(log N ) items in each level (assuming trivial buckets) in the original construction of Shi et ...a tree height of only log N k = log log N N = log N − log log N , while the ... See full document
14
Oblivious Parallel RAM: Improved Efficiency and Generic Constructions
... non- recursive version first, and then show how to apply the recursive ...the tree) bits, the size of the position map is N D = N dlog N e ... See full document
30
Perfectly Secure Oblivious RAM with Sublinear Bandwidth Overhead
... Figure 3 illustrates why the straightforward approach of directly swapping the accessed element with an element from a uniformly random cell fails. In this figure, the root node depicts a 2 × 2 matrix holding four ... See full document
26
Adaptive Garbled RAM from Laconic Oblivious Transfer
... not apply directly to our setting. In particular, in the Canetti et al. [CCHR16] and Ananth et al. [ACC + 16] constructions, CPU steps where obfuscated using an indistinguishability obfuscation scheme. Thus, in their ... See full document
44
Onion ORAM: A Constant Bandwidth Blowup Oblivious RAM
... using simple computation such as XOR and any semantically secure encryption scheme with small ciphertext blowup? A partial result in this direction comes from Burst ORAM [9]: simple computation on ... See full document
31
Oblivious Network RAM and Leveraging Parallelism to Achieve Obliviousness
... At a high level, the idea is to assign each virtual address to a pseudorandom memory bank (and this assignment stays the same during the entire execution). Suppose that a program is sufficiently parallel such that it ... See full document
29
Is there an Oblivious RAM Lower Bound for Online Reads?
... to oblivious-access sort algorithms, sorting networks sort n size-B blocks in an oblivious ...data oblivious, namely its memory accesses are independent of the ...unlike oblivious- access sort ... See full document
42
The Fallacy of Composition of Oblivious RAM and Searchable Encryption
... In this section, we first show that achieving LC0 is, in general, impossible with query communication better than that of Linear– LC0–SSE. We construct single keyword SSE schemes for LC1, LC2, and LC3 such that they have ... See full document
10
Constants Count: Practical Improvements to Oblivious RAM
... For the above approach to be secure, it is impera- tive that each block in a bucket should be read at most once—a key idea also adopted by Goldreich and Ostro- vsky in their early ORAM constructions [11]. Notice that any ... See full document
16
A Low-Latency, Low-Area Hardware Oblivious RAM Controller
... An important use case for ORAM is in trusted hard- ware [15], [7], [21], [22], [19], [6]. Figure 1 shows an example target cloud configuration. Here, a client communicates with a trusted secure cloud processor that is ... See full document
8
Octopus ORAM: An Oblivious RAM with Communication and Server Storage Efficiency
... binary tree ORAM (T-ORAM) [34], Path ORAM [38], Gentry’s ORAM [9], P-PIR [21] and SCORAM ...a tree, where each node is a bucket storing a certain number of data ... See full document
18
Privacy-Preserving Minimum Spanning Trees through Oblivious Parallel RAM for Secure Multiparty Computation
... An iteration of Alg. 4 can be seen as a sequence of three steps, separated by the Synchro- nize-statements. In first step, the edges to be added to the tree are selected. For each star with root r ∈ V , the ... See full document
20
An Oblivious Parallel RAM with $O(\log^2 N)$ Parallel Runtime Blowup
... a tree and each block is mapped to a random leaf in this ...some tree node from root to the leaf ...a simple balls and bins analysis that k = O(f (m) log m), f (m) = ω(1) leaves may be mapped to one ... See full document
12
Recursive algorithms for phylogenetic tree counting
... ranked tree is given in Figure 1. In biology, a phylogenetic tree represents the evolution- ary history of a collection of sampled ...the tree is the most recent common ancestor of X and interior ... See full document
13
Bucket ORAM: Single Online Roundtrip, Constant Bandwidth Oblivious RAM
... On the other hand, the level-rebuild-style shuffling strategy of hierarchical ORAMs have certain desirable properties. In particular, Williams and Sion show a technique to construct a single online roundtrip ORAM [44], ... See full document
33
Toward Robust Hidden Volumes using Write-Only Oblivious RAM
... based linear combination of the cover files. As the security of this scheme is based on the number of linear combinations possible, note that knowledge of some user files jeopardizes secrecy of other files. Modifications ... See full document
12
Multi-Client Oblivious RAM secure against Malicious Servers
... the tree whether this block is available or ...the tree can then be performed by simply changing the metadata to mark that the slot is ...by tree-based ORAMs for the majority of the data, while ... See full document
23
TWORAM: Round-Optimal Oblivious RAM with Applications to Searchable Encryption
... This simplified description ignores some technical hurdles. Firstly, security of the underlying ORAM scheme requires that the location where bucket[x] is found remains hidden. In particular, the garbled circuit which has ... See full document
29
NCFP tree: A Non Recursive Approach to CFP tree using Single Conditional Database
... Item tree (or COFI-tree for short) for mining frequent ...compact tree structure [16] for efficiently mining frequent ...the tree in a bottom up fashion. It constructs the compact ... See full document
10
Resizable Tree-Based Oblivious RAM
... We are the first to show how to dynamically resize constant-client memory tree-based Oblivious RAM. This allows for use cases where clients do not know in advance exactly how much storage they will ... See full document
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