| 摘要 |
Security is maintained not by judging coincidence to a special code or an exclusive IC chip but by judging coincidence to a particular indication such as a trademark which has been socially recognized and of which the imitation has been banned. A CD-ROM (17) is loaded in a game machine (10) to play a game using programmed data stored in the CD-ROM (17). The game machine is provided with a recognition sensor (22) for reading the trademark (20) on the surface of the CD-ROM (17), and a judging unit (26) that judges whether the trademark (20) read by the sensor (22) agrees with a particular trademark TM. If they do not agree, the game will not start. <IMAGE> |
