الفهرس 
Abstract
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Abstract
Digital content, with the appearance of internet and swift evolution of information technologies, has become an essential part of one’s day to day life. As it is easy to make an exact copy of the digital media, illegitimate sharing and replication of digital contents has become major concern for authors, publishers and legitimate owners of the contents. It has become imperative to keep the intellectual characteristics of digital contents of a given media. In the beginning, ciphering and control access methods were used protect from harm the authenticity of digital content of given media.