A new approach for secure data transfer in audio signals using DWT

Steganography is an information hiding technique where secret message is embedded into unsuspicious cover signal. In this paper, a novel approach of integrating the features of cryptography and audio Steganography is presented. The information to be transmitted is encrypted by using modified blowfish algorithm and resultant cipher text is embedded into a cover audio file using discrete wavelet transform (DWT). The resultant stego audio is transmitted to the receiver and the reverse process is done in order to get back the original plain text. The proposed method presents a steganographic scheme along with the cryptographic scheme which enhances the security of the algorithm.