A novel design of audio signals encryption with substitution permutation network based on the Genesio-Tesi chaotic system

Abstract

The concept of encryption is as old as the reality that confidential information has been interchanging among people. The art of transferring secret information between two parties or groups is known as cryptography. It contains the algorithms, key exchange protocols, and approaches to consistently and securely avoid unauthorized access to confidential information. Nowadays information is in digital form, therefore this factor necessitates some cryptographic algorithms for secure data transmission. In this work, we have designed a new approach for audio encryption to securely store and transfer audio signals. The suggested encryption algorithm is primarily based on Gensio-Tesi chaotic map. Substitution and permutation networks are engendered by the Gensio-Tesi chaotic system for the encryption of signals. The other important feature discussed here is the performance of offered algorithm which is ascertained by some extensive audio analysis. Experimental results reveal that the designed scheme has an essential level of security.