Information Hiding into Multimedia using Steganography

Today’s large demand of internet application’s requires data to be transmitted in a secure manner. Data transmission in pubic communication system is not secure because of interception and improper manipulation. So the solution of this problem is steganography. Which is art and science of writing hidden message in such a way that no one, apart from the sender and intent recipient, suspects the existence of the message, a form of security through obscurity. A steganography technique for embedding information in audio using LSB based algorithm with discrete wavelet transform here, we increased the capacity of the classical LSB insertion method by performing the embedded process in the wavelet domain. The two most important parameters for audio steganography algorithm are peak signal to noise ratio(PSNR) and mean square error(MSE). We have applied the least significant bit technique with DWT to improve PSNR and MSE. The results have shown increased security, improve the parameter, increased robustness. This research focuse on audio steganographyin wavelet domain, in form of waveform audio file format.is used as a substitution technique. In order to increase PSNR and decreased MSE, A secure LSB based audio steganography is proposed.