Abstract

The rapid growth of computer communications and multimedia has created a pressing need for the safeguarding of this information instantaneously. For safeguarding the information carried from hackers and maintaining its confidentiality unbroken, audio signal security has been one of the leading fields of research in recent times. A new speech signal coding is introduced in this paper. This coding has been done on the principle of converting the audio signal into a digital image and then encrypting it for ensuring confidentiality of data and prevention from tampering or interception. This operation employs different chaotic systems (e.g., the logistical map, Henon map, and Lorenz system) that are highly sensitive to minor conditions. To ensure that the image is secured to be sent, encryption techniques are used such that it becomes hard for an attacker to decrypt the encrypted image. Upon decoding the encrypted image with the inverse encoding algorithm, the system restores the original sound signal. It reconverts digital information into an aural signal through restored keys. The basis of system strength and search method for encryption is the integration of voice signal processing technologies and chaotic encryption based on chaotic systems. The proposed approach possesses the ability to improve resistance to cryptanalysis attacks and improve security during transmission.