Secure Scalable Video Transcoding Over Wireless Network

Transmission of secured video stream, from a centralized server to different clients, is performed via a middle-ware named transcoder server. The role of this transcoder is to adapt the contents of a video stream. The adaptation performed in order to fit the client capabilities and to satisfy the channel restriction bandwidth This process should be performed while preserving the stream security. Selective encryption techniques provide content protection. Just a minor part of the data containing the relevant features is encrypted. Using the selective encryption techniques save computational overheads while still achieving adequate security. In this paper, we present a new model for three tier transcoding architecture. The outcome of that model is to minimize the overhead processing of the transcoding operations while upholding the security aspect of the stream.