SYSTEM AND METHOD FOR PREVENTING ILLEGAL COPY OF A WORK BASED ON ENCRYPTION OF RANDOM NUMBER

摘要

PURPOSE: A system and a method for preventing illegal copy of a work based on encryption of a random number are provided to continuously install a work only when payment is normally performed, thereby preventing illegal copy of the work. CONSTITUTION: A download server(120) combines an installation program with a work. An approval server(130) generates an approval number by processing an inputted random number when payment is normally processed. A computer(112) downloads and stores the work. If the installation of the work is performed, a random number is generated and displayed. The computer compares an approval number of the approval server with an internally generated approval number.