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A model-based multimedia Encryption scheme for real time videos

Multimedia Encryption is an extremely useful method for the stopping unwanted interception and viewing of any transmitted video or other information. Most of the existing video encryptions algorithms that are to be considered to be of significantly increase the video size independent of encryption algorithm employed. This is because these algorithms encrypt DCTs without considering their characteristics or relationship to the visual content. This adversely affects the transmission throughput. Here we introduce a new methodology for video encoding i.e of security in which a video based security on H.264 standards that has become a new research focus. In this research mechanism it reduces the video size significantly without any compromise in security. The proposed algorithm performs encryption followed by permutation of the DCTs. On an average, increase in video size is restricted of that of the original video.