| 摘要 |
To provide a content usage management device capable of correctly determining limitation-on-usage information about contents, such as an expiration date. A memory card 2 has a storage section 22 for storing coupon data 221 and expiration date data 222 as information about contents, and a processing section 21 for performing processing pertaining to the contents. When information about the time of the portable terminal 1 has been changed, card control means 212 of the processing section 21 detects a change-of-time event; acquires the current time of the portable terminal 1 achieved before and after the change of time, by way of data communications means 211 ; and updates the expiration date data 222 stored in the memory card 2 in accordance with the time information. When the expiration date of the coupon is determined, the expiration date data 222 stored in the memory card 2 are compared with the current time of the portable terminal 1 , to thus determine whether or not the coupon is valid. |
