Up to now

most video authentication schemes are still can not able to detect unexpected bit error and their capability of recovering tampered pixels in detail areas is not satisfactory.An accurate authentication scheme is designed for MPEG-4 video integrality authentication.Coding the pixels in the intra frame with hamming code

the new scheme works on tamper proofing by combining torus automorphism and bit rotation.It can not only increase the security

but also locate and restore the distorted region at the same time.The experimental results show that the proposed scheme can effectively eliminate burst bit errors and carry out the integrity authentication in the pixel-level.It had a good capability of tamper detection

localization and recovery

and demonstrates the feasibility and practicality for the accurate authentication.