الفهرس 
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Abstract
The way people use video is changing. Nowadays, interaction with video is a requirement in many applications involving business, entertainment, education, and surveillance. Additionally, security requirements associated with video transmitted to many users make secure video communication a secure group communication process. The frame-based approach to video is also changing. Nowadays, many applications require object-based access to video.
As object-based video demand and the number of users and dynamic nature of access increase, new challenges in secure video communication appear. It is not easy to maintain group security in large groups with highly dynamic access behavior. The concept of object-based video access makes matters only more complicated. Up to now, object¬based video communication is difficult to maintain, mainly because the overhead in communicating object information and maintaining large dynamic group security is high.
Since it is difficult to solve the problem by increasing the communication resources, the call would be for object-based coding techniques and secure group management protocols that economize better on bandwidth. Up to now, state-of-the-art techniques and protocols are not capable of dealing with the challenge.
This thesis is devoted to the study of secure group object-based video communication. The thesis discusses the concepts of frame-based and object-based video coding, and entails a survey on modem video encryption techniques, as well as a survey on modem group security management protocols.
In this thesis, we also propose a novel technique for object-based coding with adaptive rate control, a novel protocol for secure group communication, an architecture for implementing object-based video services in a secure group manner, and a protocol for secure distribution of critical video encryption keys to assure system security. The thesis provides a comparison among the existing and proposed protocols, as well as test results for the proposed object-based codec. Through this work, we wish to get one step closer to covering the challenges surrounding secure object-based video communication.