Audio Encryption Optimization

摘要

The issue of security and privacy of data due to interception and improper manipulation by eavesdropper has a consequential effect based on the value of the information being transmitted. Many techniques are needed to protect the transmitted data which is in the form of text, image or even audio signals. Cryptography has a defining role in the field of network security. Various cryptographic algorithms have been designed, but still, there is a trade-off between security and performance. Our research work would be focusing on the performance of two existing encryption techniques such as AES and DES algorithm on the audio sample values obtained from the simulator MATLAB generated by the audio files of different size. Based on the results obtained this paper suggests the secure algorithm for audio file encryption and also to analyze the performance of other algorithms too as a factor of time taken. Through this paper we have proposed the model based on comparison of different size of audio files by taking into account of decimation factor through which the sample rate changes and we obtained a time taken to encrypt such generated audio files and thus we provide our analysis on AES and DES algorithm for the audio file encryption and suggesting which have better performance based on our results obtained.