摘要:
A recording medium which allows consumers to access and purchase content while protecting the copyright of the content. The recording medium includes a secure data area and a non-secure data area. The secure data area is accessible by an apparatus whose authenticity is verified, and the non-secure area is accessible by the apparatus regardless of such verification. The secure data area stores a first content key. The non-secure data area stores first data and second data which can be decrypted. The first data includes a first encrypted content which is generated by encrypting a first content with the first content key, and the second data includes a second encrypted content which is generated by encrypting a second content with a second content key, where the first and second contents are related to each other.
摘要:
A multiple function portable device prevents an occurrence of a situation in which a remainder of a battery is used up after a consumer utilizes a contents playing function of a portable device having a contents playing function, wherein not only the contents playing function but also basic functions inherent to the portable device become unavailable. A power supply control means commands a power supply means to stop the power supply to a contents playing function activator when the battery remainder measured by a battery remainder measuring means becomes lower than a predetermined value.
摘要:
The distribution server administers downloading of contents and writing in storage media. The distribution server includes the obtained rights administration database that stores information regarding rights to receive distribution of contents, and the history database that stores information regarding contents that have been distributed to the user in the past. The distribution server administers distribution of contents to each user.
摘要:
An object of the present invention is to provide a system in which it is possible to pre-warn the consumer who is trying to purchase contents that cannot be written on the PD that the contents cannot be written on the PD. Based on the PD writability information, the PD writability detector determines whether the contents distributed by the distribution system notified by the distribution system detector can be written on the PD. If it is determined that the contents cannot be written, the PD writability detector requests the controller to warn the consumer.