CryptoDB
Deterministic History-Independent Strategies for Storing Information on Write-Once Memories
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| Abstract: | Motivated by the challenging task of designing ``secure'' vote storage mechanisms, we deal with information storage mechanisms that operate in extremely hostile environments. In such environments, the majority of existing techniques for information storage and for security are susceptible to powerful adversarial attacks. In this setting, we propose a mechanism for storing a set of at most $K$ elements from a large universe of size $N$ on write-once memories in a manner that does not reveal the insertion order of the elements. We consider a standard model for write-once memories, in which the memory is initialized to the all $0$'s state, and the only operation allowed is flipping bits from $0$ to $1$. Whereas previously known constructions were either inefficient (required $\Theta(K^2)$ memory), randomized, or employed cryptographic techniques which are unlikely to be available in hostile environments, we eliminate each of these undesirable properties. The total amount of memory used by the mechanism is linear in the number of stored elements and poly-logarithmic in the size of the universe of elements. In addition, we consider one of the classical distributed computing problems: conflict resolution in multiple-access channels. By establishing a tight connection with the basic building block of our mechanism, we construct the first deterministic and non-adaptive conflict resolution algorithm whose running time is optimal up to poly-logarithmic factors. |
BibTeX
@misc{eprint-2007-13433,
title={Deterministic History-Independent Strategies for Storing Information on Write-Once Memories},
booktitle={IACR Eprint archive},
keywords={cryptographic protocols / History-indepedence, Vote storage, Conflict resolution},
url={http://eprint.iacr.org/2007/151},
note={ICALP '07. This is the full version. gil.segev@weizmann.ac.il 13698 received 25 Apr 2007, last revised 4 Jul 2007},
author={Tal Moran and Moni Naor and Gil Segev},
year=2007
}