| 摘要 |
<p>A software copying system which enables copyrighted software recorded in a master storage medium (1; 60) to be copied to a user's target storage medium (3; 40) in a legitimate manner. A contents identifier reading unit (2) reads out a software identifier (SIDi; DID) from the master storage medium (1; 60), while a storage medium identifier reading unit (4) reads out a storage medium identifier (IDk; Mid) from the target storage medium (3; 40). The two identifiers are then sent to a central site (5) which manages licenses for the right to copy software products. At the central site (5), a signature generating unit (6) produces a first signature (CS) from those identifiers and sends it back to the user's site, where a signature writing unit (7) writes the received signature into the target storage medium (3; 40). A signature generating/comparing unit (8) produces a second signature (CS') out of the same identifiers as those sent to the central site (5), and compares it with the first signature (CS) stored in the target storage medium (3; 40). A data copying unit (9) copies the subject software data file from the master storage medium (1; 60) to the target storage medium (3; 40), only when the first and second signatures (CS, CS') coincide with each other. <IMAGE></p> |
