A new speech scrambling method: Comparative analysis and a fast algorithm

V. Delić, V. Šenk, V. S. Mibsevic
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引用次数: 3

Abstract

Conventional speech scrambling concept is based on permutation of time segments and/or frequency subbands. Although this approach is regarded as an insecure speech encryption method, almost all published scramblers are of that type. W e found out that a linear combination based on Hadamardm atrices instead of conventional permutation gives better cryptographic performances, maintaining all the good features of the scrambling concept. The new scrambling method provides a large key space and a simpler key selection. It attainsnegligible residualintelligibility and higher degree of cryptanalytic immunity. The price of these great improvements is a potential complexity increase. That is why we designed a fast algorithm for the new scrambling method.
一种新的语音置乱方法:比较分析与快速算法
传统的语音置乱概念是基于时间段和/或频率子带的排列。虽然这种方法被认为是一种不安全的语音加密方法,但几乎所有已发表的扰频器都是这种类型的。我们发现基于Hadamardm矩阵的线性组合而不是传统的排列具有更好的密码性能,并且保持了置乱概念的所有优点。新的置乱方法提供了更大的密钥空间和更简单的密钥选择。它具有可忽略的剩余可解性和较高的密码分析免疫力。这些巨大改进的代价是潜在的复杂性增加。为此,我们设计了一种快速的置乱算法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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