Robust secure video steganography using reversible patch-wise code-based embedding

摘要

During the process of data hiding for secure transmission, there is possibility of easy accessing of secret data due to availability of various issues in video steganography techniques. The large size of video file is divided into different number of frames in order to process the large amount of data. By using the embedding process, the secret data is easily embedded on the cover video for either large or small amount of information. The process of encryption and decryption is performed to provide high security in data hiding algorithm. In the transformation technique, the effective decryption process arises an issue during the video encryption process. The ineffective restoration of compression process involves in the encryption of input video frames by using Discrete Cosine Transform (DCT) or Discrete Wavelet Transform (DWT) transformation. Also, the pixel information are lost due to processing of frame conversion and encoding in transformation technique. Thus, the encryption efficiency is affected by lossy pixel information. Hence, the flexible phi-correction filtering method with Blind Pixel Algorithm (BPA) technique is proposed in this paper to hide secured data without degrading the information. The pixel grouping is performed by replacing the relevant and recurrent pixels with the message information during the encryption process in order to reduce lossy pixel information. Also, the flexible phi-correction filtering method is developed as preprocessing method to remove noise information on cover and secret video by analyzing the pixel value in terms of Fast Fourier Transform (FFT) after performing the pixel optimization with the help of different boundary coefficient value. Thus, the preprocessing and pixel grouping stage in the proposed technique reduces lossy pixel information. Based on the Least Significant Bit (LSB) concept, the pixel value of secret message embeds on pixel value of cover frame sequentially by using the BPA algorithm and the disadvantage of LSB approach is overwhelmed by embedding the set of random pixel value between cover and secret video. The Patch Wise Code Formation (PWCF) algorithm is utilized as video encoding process to provide high security during data hiding process. The BPA algorithm utilizes in reversible manner to achieve efficient working of decryption process. The performance of the proposed Blind-Pixel Based Secure Data Embedding (BPSDA) technique is evaluated for various video sequences in terms of Peak Signal Noise Ratio (PSNR), Mean Square Error (MSE), Compression Rate (CR), and Bits Per Pixel (BPP).