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arXiv 1206.0069cs.CRmath.CO
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散列函数和伪随机发生器安全性分析的一个数学问题

A mathematical problem for security analysis of hash functions and pseudorandom generators

Koji Nuida, Takuro Abe, Shizuo Kaji, Toshiaki Maeno, Yasuhide Numata

摘要:

在本文中,我们指定了一类数学问题,我们称之为“函数密度问题”(简称FDP),并指出FDP与以下两个密码学主题的新颖联系;无密钥散列函数的理论安全性评估(例如SHA-1),以及Dubrov和Ishai [STOC 2006]引入的具有某些增强安全属性的可证明安全的伪随机生成器(PRG)的构造。我们的论证旨在为这些主题(特别是前者)提出新的理论框架,而不是提供一些具体的和实际的结果。我们还给出了一些例子的数学讨论的FDPs,这将是独立的兴趣从数学的观点。最后,我们讨论了未来可能的研究方向,其他密码学应用的FDPs和对FDPs本身的数学研究。

英文摘要:

In this paper, we specify a class of mathematical problems, which we refer to as "Function Density Problems" (FDPs, in short), and point out novel connections of FDPs to the following two cryptographic topics; theoretical security evaluations of keyless hash functions (such as SHA-1), and constructions of provably secure pseudorandom generators (PRGs) with some enhanced security property introduced by Dubrov and Ishai [STOC 2006]. Our argument aims at proposing new theoretical frameworks for these topics (especially for the former) based on FDPs, rather than providing some concrete and practical results on the topics. We also give some examples of mathematical discussions on FDPs, which would be of independent interest from mathematical viewpoints. Finally, we discuss possible directions of future research on other cryptographic applications of FDPs and on mathematical studies on FDPs themselves.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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