Issues and solutions for authenticating MPEG video

摘要: Video authentication techniques are used to prove the originality of received video content and detect malicious tampering. Existing protect every single bit do not allow any form manipulation. In real applications, this may be practical. several situations, compressed videos need further processed accommodate various application requirements. Examples include bitrate scaling, transcoding, frame rate conversion. The concept asking each intermediate processing stage add codes is flawed in practical cases. paper, we extend our prior work on JPEG- surviving image video. We first discuss issues authenticating MPEG under transcoding including dynamic shaping, requantization, type conversion, re-encoding. Different situations pose different technical challenges developing robust techniques. second part propose a system which accepts some processes but able manipulations. It based unique invariant properties processes. Digital signature as well public key methods system.