A very efficient encryption scheme for the H.264/AVC CODEC adopted in Intra prediction mode

The concept of data compression in CODECs is based on pixel prediction to avoid redundancy. For the security of data compressed with the H.264/AVC CODEC, researchers are thinking to selective encryption. This paper presents a chaos based encryption method inserted in the H.264/AVC used for video conferencing application. It consists of the encryption of Intra prediction mode. The results show that the proposed method preserves format compliance of the H.264/AVC and has a low impact on the compression ratio. It is secure and very efficient. Moreover it can be realized in real time application. The metrics used to evaluate our scheme are Peak Signal to Noise Ratio (PSNR), Structural SIMilarity (SSIM) and the Encryption Rate (ER). We also discuss the key sensitivity of our algorithm and histograms of encrypted videos.