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- W4300918346 abstract "We present a new oblivious RAM that supports variable-sized storage blocks (vORAM), which is the first ORAM to allow varying block sizes without trivial padding. We also present a new history-independent data structure (a HIRB tree) that can be stored within a vORAM. Together, this construction provides an efficient and practical oblivious data structure (ODS) for a key/value map, and goes further to provide an additional privacy guarantee as compared to prior ODS maps: even upon client compromise, deleted data and the history of old operations remain hidden to the attacker. We implement and measure the performance of our system using Amazon Web Services, and the single-operation time for a realistic database (up to $2^{18}$ entries) is less than 1 second. This represents a 100x speed-up compared to the current best oblivious map data structure (which provides neither secure deletion nor history independence) by Wang et al. (CCS 14)." @default.
- W4300918346 created "2022-10-04" @default.
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- W4300918346 date "2015-05-27" @default.
- W4300918346 modified "2023-09-24" @default.
- W4300918346 title "A Practical Oblivious Map Data Structure with Secure Deletion and History Independence" @default.
- W4300918346 doi "https://doi.org/10.48550/arxiv.1505.07391" @default.
- W4300918346 hasPublicationYear "2015" @default.
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