DIGITAL CONTENT DELIVERY SYSTEM

摘要

An access condition (601) is established by a right management server (100), and a user terminal (110) designates the time and frequency at which to access the right management server (100). The user terminal (110) transmits a usage right purchase request (800), thereby receiving a license data (1700) for using contents. Then, the terminal apparatus (110) transmits, based on the access condition (601) included in the license data (1700), a license data version-up request (900), and receives a license data (1400) of the latest version from the right management server (100) to update the original license data (1700). In this way, the license data can be changed at appropriate timings even after the license data is delivered to the user terminal (110).