Using color image to encrypt-decrypt wave file

Abstract: Digital audio files are one of the important types of data to be used in many vital applications, which leads us to protect this type of data from intruders and snoopers, as it may contain confidential information that not allowed to be viewed by any unauthorized third party . In this paper, we present a new method for protecting audio files that depends on the use of the digital color image or part of it as a key to the encryption or decryption process. The digital image used as a key is characterized by its enormous size, in addition to that, the image is not circulated through social media, but rather is agreed upon between the speaker and the listener, which leads to difficulty being known by the interlopers, and thus we provide a safe way to deal with audio files. The proposed method will be implemented and tested to measure the efficiency and quality factors.

Keywords: Speech file, encryption, decryption, WPT, YIQ, MSE, PSNR.