| 摘要 |
<p>The object of the present invention is to provide a contents data utilization system in which the contents data is shared between a plurality of mobile communication terminals while the copyright is protected. When the contents data downloaded via a communication network is stored into an external memory (4) of a mobile communication terminal (1), an SIM data processing unit (14) generates a cipher key, using an IMSI that is an identifier stored in an SIM card (5) inserted into the terminal (1). Using the cipher key, a contents data processing unit (13) encodes the downloaded contents data, and stores it into the external memory (4). When the contents data is reproduced, the SIM data processing unit (14) generates a cipher key, using the identifier stored in the SIM card (5), and decodes and reproduces the contents data stored in the external memory (4). Thereby, the contents data can be shared between a plurality of mobile communication terminals owned by the user having the SIM card.
</p> |
