Content data delivery system, and method for delivering an encrypted content data

• US 20070043769A1
• Filed: 08/18/2006
• Published: 02/22/2007
• Est. Priority Date: 08/18/2005
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Suu, Hiroshi, Miura, Akira, Kasahara, Akihiro
• Granted Patent: US 8,307,458 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management data processing systems or methods, specially adapted for commerce, e.g. marketing, shopping, billing, auctions or e-commerce G06Q30/00
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 9/0822 using key encryption key
• CPC Class Codes: H04L 9/083 involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]
• CPC Class Codes: H04L 9/0897 involving additional devices, e.g. trusted platform module [TPM], smartcard or USB

Abstract

A handheld device is configured to be connectable to a storage media that holds a unique media identifier and holds a content key data used to decrypt an encrypted content data. A content data delivery system is provided that is configured to be able to deliver various data to the handheld device and to make a content data available to the handheld device. The system includes a member-registration information database that holds member-registration information including a data pair of a handheld-device identifier related to the relevant handheld device and the relevant media identifier. The media identifier held by the storage media is verified with the member-registration information database. When it is determined that the media identifier corresponds to the member-registration information, the content key data held in the storage media is read, and it is determined whether an encrypted content data corresponding to the read content key data is stored in the storage media or other storage media coupled to the storage media. The encrypted content data is transferred to the storage media or the like depending on the user'"'"'s specification.

Claims

1. A content data delivery system configured to be able to deliver various data to a handheld device and to make a content data available in said handheld device, said handheld device being configured to be connectable to a storage media that holds a unique media identifier and holds a content key data used to decrypt an encrypted content data, said content data delivery system comprising:

a member-registration information database that holds member-registration information including a data pair of a handheld-device identifier related to said handheld device and said media identifier;

a verification portion that reads said media identifier held by the storage media and verifies said media identifier with said member-registration information database;

a storage condition determination portion that, when said verification portion determines that said media identifier corresponds to said member-registration information, reads said content key data held in the storage media, and determines whether an encrypted content data corresponding to the read content key data is stored in said storage media or other storage media coupled to said storage media;

a display portion that displays a determination result of said storage condition determination portion; and

a transfer portion that transfers said encrypted content data to said storage media or said other storage media depending on user'"'"'s specification of said storage media.

2. The content data delivery system of claim 1, further comprising a member content-key database that holds a member content-key data that is the content key data held by said user in such a way that said member content-key data is associated with said media identifier or said handheld-device identifier,

wherein

said member content-key data is transferred to said storage media in response to said user'"'"'s request.

3. The content data delivery system of claim 1, wherein an encrypted content data corresponding to a content key data not held in said storage media is accepted at the same time as or before acquirement of said content key data up to a predetermined number of times.

4. A method for delivering an encrypted content data to a handheld device, said handheld device being configured to be connectable to a storage media that holds a media identifier unique to the storage media and a content key data used to decrypt the encrypted content data, said method comprising:

storing in a database member-registration information including a data pair of a handheld-device identifier related to the handheld device and the media identifier;

verifying that the media identifier is stored in the database after reading the media identifier of the storage media;

determining whether an encrypted content data corresponding to the content key data is stored in the storage media or other storage media, when the media identifier is verified that it is stored in the database; and

transferring the encrypted content data corresponding to the content key data to the storage media or the other storage media, when the storage media or other storage media do not contain the encrypted content data.