A Simple ORAM

نویسندگان

  • Kai-Min Chung
  • Rafael Pass
چکیده

In this short note, we demonstrate a simple and practical ORAM that enjoys an extremely simple proof of security. Our construction is based on a recent ORAM due to Shi, Chan, Stefanov and Li [SCSL11], but with some crucial modifications, which significantly simply the analysis. ∗Cornell University. {chung,rafael}@cs.cornell.edu Chung is supported in part by NSF Award CCF-1214844 and Pass’ Sloan Fellowship. Pass is supported in part by a Alfred P. Sloan Fellowship, Microsoft New Faculty Fellowship, NSF Award CNS1217821, NSF CAREER Award CCF-0746990, NSF Award CCF-1214844, AFOSR YIP Award FA9550-10-1-0093, and DARPA and AFRL under contract FA8750-11-20211. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the Defense Advanced Research Projects Agency or the US Government.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Path ORAM: An Extremely Simple Oblivious RAM Protocol Citation

We present Path ORAM, an extremely simple Oblivious RAM protocol with a small amount of client storage. Partly due to its simplicity, Path ORAM is the most practical ORAM scheme known to date with small client storage. We formally prove that Path ORAM has a O(logN) bandwidth cost for blocks of size B = Ω(logN) bits. For such block sizes, Path ORAM is asymptotically better than the best known OR...

متن کامل

Recursive ORAMs with Practical Constructions

We present Recursive Square Root ORAM (R-SQRT), a simple and flexible ORAM that can be instantiated for different client storage requirements. R-SQRT requires significantly less bandwidth than Ring and Partition ORAM, the previous two best practical constructions in their respective classes of ORAM according to client storage requirements. Specifically, R-SQRT is a 4x improvement in amortized b...

متن کامل

Flat ORAM: A Simplified Write-Only Oblivious RAM Construction for Secure Processors

Oblivious RAM (ORAM) is a cryptographic primitive which obfuscates the access paŠerns to a storage thereby preventing privacy leakage. So far in the current literature, only ‘fully functional’ ORAMs are widely studied which can protect, at a cost of considerable performance penalty, against the strong adversaries who can monitor all read and write operations. However, recent research has shown ...

متن کامل

A Case of Holt - Oram Syndrome

SUMMARY Holt Oram Syndrome consisting of upper limb defcts, cardiac anomalies and narrow shoulder, was first described by Holt and Oram in 1960. The inheritance pattern is autosomal dominant and most commonly encoutered cardiac anomalies being ASD, although all variaties of C.H.D are reported. Upper limb anomalies are not specific, although scaphoid bone deformity is almost characteristic in t...

متن کامل

Ring ORAM: Closing the Gap Between Small and Large Client Storage Oblivious RAM

We present Ring ORAM, a simple and low-latency ORAM construction that can be parameterized for either small or large client storage. Simply by tuning parameters, Ring ORAM matches or exceeds the performance of the best-known small and large client storage schemes and can achieve a constant factor online bandwidth overhead over insecure systems. We evaluate Ring ORAM in theory and in practice. O...

متن کامل

Constants Count: Practical Improvements to Oblivious RAM

Oblivious RAM (ORAM) is a cryptographic primitive that hides memory access patterns as seen by untrusted storage. This paper proposes Ring ORAM, the most bandwidth-efficient ORAM scheme for the small client storage setting in both theory and practice. Ring ORAM is the first tree-based ORAM whose bandwidth is independent of the ORAM bucket size, a property that unlocks multiple performance impro...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • IACR Cryptology ePrint Archive

دوره 2013  شماره 

صفحات  -

تاریخ انتشار 2013