PURPOSE: To provide a storage medium which promotes the prevention of the illegal usage of a software spreading on a circulation route, reader of the software of the storage medium, and management system which checks the illegal usage of the software of the storage medium.
CONSTITUTION: A hybrid type storage medium constituted by the combination of a non-reloadable storage area 10 with a reloadable area 11 is prepared as a storage medium 1, the cipher information of the software to be offered is recorded in the non-reloadable storage area 10, and the cipher information of key information for decoding the cipher software and the usable period of time of the software is recorded in the reloadable storage area 11. On the other hand, a reader 4 is constituted to decrease the usable period of time of the storage medium 1 according to the lapse of time, and to inhibit the usage of the software beyond the usable period of time. On the other hand, the management system is constituted to check the illegal usage of the software according to the display value of the number of time of the using period of time of the storage medium 1.
HASEBE TAKAYUKI
YOSHIOKA MAKOTO
| JPH05298085A | 1993-11-12 |