Why DRM Cannot Protect Copyrights  ---  Workshop on Digital Rights Management 22-23 January 2001         Challanges beyond DRM (2) Disadvantages of the manual check:    *   search engines are not reliable    *   volume of data is immense    *   research has to be repeated periodically    *   the researcher has to identify all digital works Advantages of the monitoring engine:    *   the search is performed autonomously    *   covering of very large realms of the Internet    *   the results are always up-to-date    *   copys are recognised by reference pattern database <<  >>