使用内存有限的接收器进行无关传输

C. Cachin, C. Crépeau, Julien Marcil
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引用次数: 107

摘要

我们提出了一种无条件安全的遗忘传输协议,该协议的唯一假设是接收方的内存大小是有限的。该模型假设一个比接收方内存稍大的随机比特串被广播(由发送方或第三方)。在我们的构造中,对于某些/spl alpha/< 1/2,当广播大小为n =n/sup 2-/spl alpha/-/spl beta//的随机字符串时,对于/spl alpha/>/spl beta/>0,双方都需要大小为/spl theta/(n/sup 2-2/spl alpha//)的内存,而恶意接收器对于任何/spl gamma/<1可以拥有多达/spl gamma/ n位的内存。在我们的分析过程中,我们提供了一个与M. Naor等人(1998)密切相关的交互式哈希协议的直接研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oblivious transfer with a memory-bounded receiver
We propose a protocol for oblivious transfer that is unconditionally secure under the sole assumption that the memory size of the receiver is bounded. The model assumes that a random bit string slightly larger than the receiver's memory is broadcast (either by the sender or by a third party). In our construction, both parties need memory of size in /spl theta/(n/sup 2-2/spl alpha//) for some /spl alpha/< 1/2 , when a random string of size N=n/sup 2-/spl alpha/-/spl beta// is broadcast, for /spl alpha/>/spl beta/>0, whereas a malicious receiver can have up to /spl gamma/N bits of memory for any /spl gamma/<1. In the course of our analysis, we provide a direct study of an interactive hashing protocol closely related to that of M. Naor et al. (1998).
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