Statistical cryptanalysis of DFT-based speech scramblers

Wen-Whei Chang*, Jeng Yih Wang, Tan Hsu Tan

*Corresponding author for this work

研究成果: Conference article同行評審


This paper presents an automated attack for crypt-analysis of transform-based analog speech scramblers. In this system, the key estimate is recovered by imbedding the discrete key in a continuous set and maximizing the statistical likelihood function over the continuous keyspace. Furthermore, a novel likelihood maximization algorithm has been developed to account for the doubly stochastic constraint of the underlying keyspace. It is shown that the proposed statistical cryptanalysis appears useful in breaking the scrambled speech under a ciphertext only attack.

頁(從 - 到)1191-1195
期刊National Conference Publication - Institution of Engineers, Australia
發行號94 /9
出版狀態Published - 1 十二月 1994
事件Proceedings of the International Symposium on Information Theory & Its Applications 1994. Part 1 (of 2) - Sydney, Aust
持續時間: 20 十一月 199424 十一月 1994

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