The week's pick
Reseach Article
Lorenz and Rossler Chaotic System for Speech Signal Encryption
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 128 - Number 11 |
| Year of Publication: 2015 |
| Authors: Eman Hato, Dalya Shihab |
10.5120/ijca2015906670
|
Eman Hato, Dalya Shihab . Lorenz and Rossler Chaotic System for Speech Signal Encryption. International Journal of Computer Applications. 128, 11 ( October 2015), 25-33. DOI=10.5120/ijca2015906670
Abstract
In this paper an algorithm for speech encryption based on three dimension chaotic maps is proposed. The proposed algorithm consists of three main units: generation of keys, samples substitution and samples permutation process. In order to maximize the benefits of the substitution process, it is performed in two stages with cipher feedback, for the system. Moreover bit-level permutation for sample is introduced as substitution mechanism in the permutation stage. The Lorenz and Rossler chaotic system are employed as generation of keystream used for substitution and permutation process respectively. From the experimental results, it is concluded that the proposed algorithm has the advantages of very low residual intelligibility, key sensitivity and high quality recovered signal, and moreover the proposed algorithm can resist known- plaintext attacks and supports large key space make brute-force attacks infeasible.
References
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