Abstract:
Steganography is a technique employed for hiding the secret data under cover object. It resolves the problem of network security and provides secure communication through public and private channels. The cover can be text, image, audio or video. In this technique, the secret information is concealed in a video cover. Video file contains some identical frames, which are selected to hide the data. When steganography by this process is used, the probability to uncover the secret information by an attacker is very less as compared to the other methods to hide data frame-by-frame in a sequential manner. It also increases the robustness of data in case of frame dropping and frame adding attacks. In this proposed work a modified technique has been used to embed the data. This technique involves the application of wavelet transform on cover file followed by the application of LSB technique in sub bands. Lower frequency sub-band is selected to hide the encrypted data in cover file. The performance metrics such as Peak Signal to Noise Ratio (PSNR), Mean Square Error (MSE) and Mean Absolute Error (MAE), have been considered for experiment verification.

Keywords: Wavelet transform, Identical frames, Encrypted data, LSB