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Enforcement: Copyright Management and Control Technologies |
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With the increased ease of the reproduction and transmission of unauthorized copies of digital works over electronic networks concerns among the copyright holder community have arisen. They fear a further growth of copyright piracy and demand adequate protection of their works. A development, which started in the mid 1990s and considers the copyright owner's apprehensions, is the creation of  copyright management systems. Technological protection for their works, the copyright industry argues, is necessary to prevent widespread infringement, thus giving them the incentive to make their works available online. In their view the ideal technology should be "capable of detecting, preventing, and counting a wide range of operations, including open, print, export, copying, modifying, excerpting, and so on." Additionally such systems could be used to maintain "records indicating which permissions have actually been granted and to whom".
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Chappe's fixed optical network
Claude Chappe built a fixed optical network between Paris and Lille. Covering a distance of about 240kms, it consisted of fifteen towers with semaphores.
Because this communication system was destined to practical military use, the transmitted messages were encoded. The messages were kept such secretly, even those who transmit them from tower to tower did not capture their meaning, they just transmitted codes they did not understand. Depending on weather conditions, messages could be sent at a speed of 2880 kms/hr at best.
Forerunners of Chappe's optical network are the Roman smoke signals network and Aeneas Tacitus' optical communication system.
For more information on early communication networks see Gerard J. Holzmann and Bjoern Pehrson, The Early History of Data Networks.
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