A Modified Enhanced Method of Audio – Video Steganography for High Security Data Transmission

Abstract

Steganography is an art of convert communication, which offers secrete and secure way of communication. It has many application areas such as audio-video synchronization,in defense forces etc… The audio data is converted into binary format and encrypted using a XOR encryption algorithm. Then the encrypted audio data converted into XL data form. The video frames are divided into non-overlapping blocks, and the difference between the adjacent pixels in each block is computed to obtain a reference matrix. Each block is then iterated through, if the difference between adjacent pixels is greater than or equal to the average difference in the reference matrix, the MPVD (Modified Pixel Value Differencing) based LSB of the pixel value is modified to embed the encrypted audio data bit. The embedded bit is then XORed with the corresponding LSB of adjacent pixel in the same block. The modified video frames can be sent over an unsecured channel without revealing the embedded encrypted audio data. To extract the encrypted audio message from the stego video, the embedded bits are XORed with the corresponding LSB of the adjacent pixel in the same block, and the modified LSBs are extracted and decrypted using the same encryption algorithm and key.