摘要:
A reception apparatus includes a first timer and sends to a distribution apparatus a first date-time clocked by the first timer. The distributing apparatus includes a second timer, and generates expiry information based on a difference obtained by subtracting, from the first date-time, a second date-time that is clocked by the second timer. The expiry information is used to adjust a usage expiry date-time of content. The reception apparatus judges whether playback of the content is permitted based on the first timer and the expiry information. With this arrangement, unauthorized use of the content beyond the expiry date-time is prevented.
摘要:
A theft prevention system capable of preventing theft of a target object by disabling the authorized key of the target object in the case where the authorized key has been stolen. When the authorized key is lost, a mobile telephone 100 instructs a vehicle control device 300a to set a warning mode. On receipt of this warning mode instruction, the vehicle control device 300a sets warning mode, generates an electronic key, and transmits the generated electronic key to the mobile telephone 100, which receives and stores the electronic key. Once the warning mode is set in the vehicle, locking and unlocking are only possible using the electronic key. If the authorized key is found, the mobile telephone 100 instructs the vehicle control device 300a to set the normal mode. Upon receipt of this normal mode instruction, the vehicle control device 300a sets the normal mode in the vehicle. Once the normal mode is set in the vehicle, locking and unlocking are only possible using the authorized key.
摘要:
A contents supply apparatus supplies sub-content that relates to main content. A DVD-ROM stores a bind key unique to the DVD-ROM and main content that is a digital work. A main player reads the bind key from the DVD-ROM, acquires sub-content that relates to the main content stored on the DVD-ROM, generates encrypted sub-content by encrypting the acquired sub-content based on the read bind key, and writes the generated encrypted content to an SD memory card. A sub-player reads the bind key from the DVD-ROM, reads the encrypted sub-content from the SD memory card, generates sub-content by decrypting the read encrypted sub-content based on the bind key, and plays back the generated sub-content.
摘要:
To provide a highly user-friendly content moving device which prevents unauthorized copying of content and, when content that has been irreversibly converted and moved to a recording medium is moved back to a move source, can use the content in its form before irreversible conversion. A partial information extraction unit 110 extracts, from content stored on a content storage unit 104, partial data necessary for playback of the content, and a write/read unit 116 writes the partial data to a partial information storage unit 304 and overwrites a portion of the content corresponding to the partial data with different data, while a conversion unit 107 transcodes the content and writes the transcoded content and the partial data to the recording medium.
摘要:
With an object of disclosing various techniques for both usage and protection of content, the present invention has an object of providing a playback control apparatus, a position judgment apparatus, and a playback control system that permit playback of content only in one area. In other to achieve the object, with the present invention, when a user passes through an automated ticket barrier to enter a station, the automated ticket barrier transmits, to a memory card via the mobile telephone, a playback key for playing content. When the user passes through an automated ticket barrier to leave a station, the automated ticket barrier instructs the memory card, via the mobile telephone, to delete the playback key, and the memory card deletes the playback key.
摘要:
A service user's personal information that has been verified and to which a digital signature has been attached by a personal information verification apparatus (signed-personal information) is stored in a highly secure form within a service user apparatus. For receiving services, the service user apparatus transmits the signed-personal information stored there into a service provider apparatus. The service provider apparatus verifies the signed-personal information based on the digital signature, and then provides services based on the personal information.
摘要:
A useful ticket management system is provided, which can perform adjustment using a ticket to which non-updatable value information is assigned together with an electronic value, according to a payment form. The ticket management system includes an IC tag attached to a money ticket, a money ticket management server, and a mobile terminal. The IC tag holds a money ticket ID for identifying the money ticket, and reads the money ticket ID. The money ticket management server includes a storage unit, receives the money ticket ID from the mobile terminal, and writes a valid money ticket ID to the storage unit. The mobile terminal includes a storage unit, acquires the money ticket ID held in the IC tag, transmits the acquired money ticket ID to the money ticket management server, and writes amount information of the money ticket identified by the valid money ticket ID to the storage unit.
摘要:
A radio communication system includes a mobile terminal device to which a memory card is attached and a server device. The server device and the memory card transfer information to each other through the mobile terminal device by radio communication. This is achieved in the following manner. When receiving a start request from the server device, the mobile terminal device supplies power to the memory card. Furthermore, the mobile terminal device communicates with the server device, to prepare for information transfer to be performed between the server device and the memory card. After becoming able to operate, the memory card performs a boot operation. When completing the boot operation, the memory card starts information transfer with the server device through the mobile terminal device.
摘要:
The IC card is capable of providing a plurality of services to an external device on one card, and comprises: a interface for the external device; a switch disposed on the IC card and that selects a service; a memory unit recording a information corresponding to a plurality of services and having a plurality areas each storing different information from another areas in security level; a CPU reading/writing information from/to the memory unit based on the service selected by the switch, and provides the selected service to the external device by way of the interface; a security level judgment unit judging the security level on an access status by the application to the memory areas; and a display unit displaying a kind of selected service or a security level of the service.
摘要:
A storage-medium rental system includes a portable storage medium to be rented to the user, a portable semiconductor memory owned by the user, a rental-shop apparatus owned by the rental agent, and a playback apparatus owned by the user. The storage medium prestores encrypted content generated by encrypting digital work using a content encryption key. The semiconductor memory has an area f or securely storing a content decryption key. The rental-shop apparatus stores a content decryption key for decrypting the encrypted content. The rental-shop apparatus writes the content decryption key to the semiconductor memory. The playback apparatus securely reads the content decryption key from the semiconductor memory, reads the encrypted content from the storage medium, decrypts the encrypted content using the content decryption key, and plays back the decrypted content.