Audio Signal Encryption Based on Permutation Relations and Residue Number System

Journal of Advances in Computer Research

شناسنامه علمی شماره، دوره 7، شماره 3 - شماره پیاپی 25، آبان 2016، صفحه 67-76   

نویسندگان

Fereshteh Ghanbari Adivi^* ؛ Mohammad Mehrnia

M.Sc. Computer Systems Architecture, Dezfoul Branch, Islamic Azad University, Dezfoul, Iran

چکیده

This paper presents a new audio encryption algorithm based on permutation and residue number system. In the current approach, signal samples are combined with residue number system through permutation; therefore, a specific noise is generated. Then, the audio signal is combined with the noise, generated by the algorithm, to produce a silence signal. For this purpose, the algorithm uses a predefined permutation format and a modular set in the form of {2ⁿ-1, 2ⁿ, 2ⁿ+1} to encrypt the main signal. Consequently, the proposed algorithm converts the input signal into a silence signal and increases its security. The signal-to-noise ratio (SNR) was used to evaluate the algorithm. The results indicated very low values of SNR pertaining to audio signals in the proposed method.

کلیدواژه‌ها

Encryption؛ Decryption؛ SNR؛ Residue Number System؛ Audio Signal؛ Permutation