Video Steganography Algorithm Based on Trailing Coefficients

Accompany with the growth of the speed in network, people´s living standard has greatly improved, but the threaten to its information´s security has also appeared, as a important branch of information security, steganography is a useful method to protect the secret information safety. In view of the high complexity of current video steganographic algorithms, and combining with the trailing coefficient produced in the process of quantization of H.264 encoding standard, we put forward a kind of algorithm based on trailing coefficients. The algorithm firstly conducts DCT transform on the frame, and then obtains the trailing coefficient for each quantized DCT blocks, last embedded by changing its values. The experimental result indicates that, this algorithm has little influence on video quality and has a few changes to the DCT coefficients after embedding, and has large capacity of steganography, and has high robustness. Above all, the information security has been protected.