عنوان مقاله [English]
نویسنده [English]چکیده [English]
Digital technology has transformed the marketplace for copyright protected works. Text, music and images are reduced to digital data which can be transmitted in digital form at high speed throughout the world. At the same time, commercial piracy and copying for private use have been ever more difficult to control. National and international forum, therefore have developed legal and technical protection measures of copyright.