Abstract
In this paper, we present an algorithm for encrypting audio files based on the Ikeda map, a mathematical function of chaos theory. Detailed experimental, security and theoretical analysis is provided on the proposed algorithm using histogram analysis, using different measurements including the signal-to-noise ratio, the peak signal-to-noise ratio, the number of samples change rate and the correlation coefficient. The provided results show a highly secure and strong algorithm against different types of attacks.
Highlights
The fast revolution in communication we are currently experiencing needs faster and more secure means of ensuring the security of audio messages
This paper presents a new design of the algorithm for audio files encryption
The waveform plots of the tested audio files demonstrate the changes between the original files and the encrypted files
Summary
The fast revolution in communication we are currently experiencing needs faster and more secure means of ensuring the security of audio messages. In Reference [4], a novel audio signal encryption algorithm based on a combination of three chaotic maps was presented. In [5], four different voice signals with different running times were sampled and their values were permuted using the chaotic logistic function and the permuted numbers were further separated into four parts to present the novel audio encryption scheme. In Reference [9], a novel audio encryption scheme based on the Henon–Tent chaotic pseudo-random number array was proposed. In [15], the authors presented an audio encryption algorithm using confusion and diffusion based on multi-scroll chaotic function. We applied the pseudo-random number generator based on the Ikeda map [16] to a novel audio encryption scheme;.
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