arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1001.1802cs.CR
收藏

融合离散对数问题

Fusion Discrete Logarithm Problems

Martin Schaffer, Stefan Rass

摘要:

离散对数问题在密码学家中是众所周知的,因为它的计算难度为当今最常用的一些密码系统提供了安全性。尽管如此,这些中的许多仅限于允许实现算法的少量候选代数结构。为了将基于离散对数的密码体制的适用性扩展到更丰富的代数结构,我们提出了指数函数的一种推广形式。我们的扩展放宽了对指数的一些假设,不再要求指数是整数。使用一个公理化的指数函数的特征,我们展示了如何构建映射,遵守相同的规则,指数,但可以提高向量的权力,其他向量的代数声音的方式。同时,计算硬度不受影响(事实上,这个问题可能会被加强)。根据我们的广义指数函数建立标准的密码系统是简单的,不需要改变现有的安全证明。这为建立比迄今为止已知的更一般的方案开辟了领域。

英文摘要:

The Discrete Logarithm Problem is well-known among cryptographers, for its computational hardness that grants security to some of the most commonly used cryptosystems these days. Still, many of these are limited to a small number of candidate algebraic structures which permit implementing the algorithms. In order to extend the applicability of discrete-logarithm-based cryptosystems to a much richer class of algebraic structures, we present a generalized form of exponential function. Our extension relaxes some assumptions on the exponent, which is no longer required to be an integer. Using an axiomatic characterization of the exponential function, we show how to construct mappings that obey the same rules as exponentials, but can raise vectors to the power of other vectors in an algebraically sound manner. At the same time, computational hardness is not affected (in fact, the problem could possibly be strengthened). Setting up standard cryptosystems in terms of our generalized exponential function is simple and requires no change to the existing security proofs. This opens the field for building much more general schemes than the ones known so far.

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。

↑