| 摘要 |
PROBLEM TO BE SOLVED: To prevent unauthorized use of an application with expiration date by an operation of a built-in clock in an information processor capable of executing a plurality of applications. SOLUTION: As shown in Figure 4, the information processor is provided with an unauthorized use prevention means of the application with expiration date having a system built-in clock 402, a time setting means, the application with expiration date, an accumulated setting difference time storage 404, a time setting means for updating the accumulated setting difference time storage, an application information storage for storing accumulated setting difference time, and an application expiration date determination means for determining the expiration date 407 of the application 406 using the current time and the accumulated setting difference time. COPYRIGHT: (C)2009,JPO&INPIT |
