A Multilayered Encryption for the Robust Design and Implementation of Secure Audio Files
摘要
The proliferation of digital technologies has resulted in the creation of a great deal of cryptographic techniques for the safe transfer and storage of private information. There is a widespread application of the SHA-256 technique, which is a cryptographical hash function, to verify the validity, identity, and integrity of data. In this research, a multi-layer approach to enhance the security of audio encryption has been adopted. The Exceptional features of audio files ensure a strong defense alongside potential cryptographic vulnerabilities is intended to be addressed by this methodological plan. The waveform analysis, histogram analysis, correlation analysis, spectrogram analysis, number of sample change rate referred to as NSCR, key sensitivity, universal average changing intensity referred to as UACI, peak single to noise ratio, signal to noise ratio, crest factor and values of the root-mean-square is presented. The proposed method displays favorable numerical results across different factors. The result of the correlation coefficient is 0.000119, representing a minimal linear relationship between original wav file and encrypted wav file. With a key space of 2256, the algorithm ensures a robust cryptographic foundation. Additionally, it maintains a high NSCR value of 99.9985%, indicating significant sample alteration, while offering a low UACI value of 0.33%, suggesting minimal average intensity changes between encrypted and original audio. Based on the findings of this result analysis, it is clear that the audio encryption approach that was provided is suitable for use in applications that include secure speech transmission.