Content distribution program, content distribution method, server, content utilization apparatus, and content utilization system

• US 8,595,139 B2
• Filed: 03/22/2007
• Issued: 11/26/2013
• Est. Priority Date: 09/24/2004
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Maruyama, Hidefumi, Chiba, Tetsuhiro, Hachiya, Yuuki
• Primary Examiner(s): KUCAB, JAMIE R
• Application Number:
  US11/726,740
• Publication Number:
  US 20070239619A1
• Time in Patent Office: 2,441 Days
• Field of Search: 705/59
• US Class Current: 705/59
• CPC Class Codes: G06Q 30/06 Buying, selling or leasing transactions
• CPC Class Codes: H04L 2209/603 Digital right managament [DRM]
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/10 for controlling access to devices or network resources
• CPC Class Codes: H04L 9/0825 using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates

Abstract

An encrypted content and a license are separated from each other to be distributed individually, so that the encrypted content is decrypted using the license in a user apparatus. A server encrypts licenses of a plurality of encrypted contents for package sale to generate an inactive license packaged in one file and distribute the inactive license to a user terminal utilizing an activation license for package sale. An activation license for package sale is distributed in response to a purchase request from the user terminal, a plurality of encrypted licenses contained in the inactive license are decrypted, an encrypted content contained in an object for package sale is decrypted using a license corresponding thereto so that the decrypted content is reproduced.

Claims

1. A non-transitory computer-readable storage medium storing a content distribution program that causes a server, which distributes a plurality of contents that are provided for distribution individually and in a package of more than one content, to execute:

individually encrypting each of the contents to be distributed;

individually generating a license corresponding to each encrypted content;

generating an activation license for package distribution of more than one content;

generating an inactive license packaged in one file by encrypting the licenses of each of the encrypted contents included in the package distribution using a cryptography key of the activation license;

outputting the inactive license for the package distribution along with the encrypted contents and the corresponding individual licenses to a mobile medium recorder; and

when receiving a request for the package distribution from a user terminal having the inactive license, the encrypted contents and the corresponding individual licenses, distributing the activation license to the user terminal;

wherein the activation license includes the cryptography key for encrypting the licenses of the encrypted contents, and a permission condition of the encrypted contents, and

the inactive license includes combined metadata describing an album with contents to be packaged in addition to the cryptography key and the permission condition.

2. The storage medium according to claim 1, when the inactive license is distributed, the inactive license is stored with the encrypted contents in a mobile medium to provide the mobile medium to the user apparatus.

3. The storage medium according to claim 1, wherein

the user apparatus reads a plurality of encrypted contents corresponding to the metadata of the inactive license to reproduce contents according to the constitution of the album.

4. A content distribution method for distributing a plurality of contents that are provided for distribution individually and in a package of more than one content, comprising:

individually encrypting each of the contents to be distributed;

individually generating a license corresponding to each encrypted content;

generating an activation license for package distribution of more than one content;

generating an inactive license packaged in one file by encrypting the licenses of each of the encrypted contents included in the package distribution using a cryptography key of the activation license;

outputting the inactive license for the package distribution along with the encrypted contents and the corresponding individual licenses to a mobile medium recorder; and

when receiving a request for the package distribution from a user terminal having the inactive license, the encrypted contents and the corresponding individual licenses, distributing the activation license to the user terminal,

wherein

the activation license includes the cryptography key for encrypting the licenses of the encrypted contents, and a permission condition of the encrypted contents, and

the inactive license includes combined metadata describing an album with contents to be packaged in addition to the cryptography key and the permission condition.

5. A content distribution apparatus which distributes a plurality of contents that are provided for distribution individually and in a package of more than one content, comprising:

an encrypted content generating unit which individually encrypts each of the contents to be distributed;

a license generating unit which generates a license corresponding to each encrypted content;

an activation license generating unit which generates an activation license for package distribution of more than one content;

an inactive license generating unit which generates an inactive license packaged in one file by encrypting the licenses of each of the encrypted contents included in the package distribution using a cryptography key of the activation license;

an inactive license outputting unit which outputs the inactive license for the package distribution along with the encrypted contents and the corresponding individual licenses to a mobile medium recorder; and

an activation license distributing unit which when receiving a request for the package distribution from a user terminal having the inactive license, the encrypted contents and the corresponding individual licenses, distributes the activation license to the user terminal;

wherein

the activation license includes the cryptography key for encrypting the licenses of the encrypted contents, and a permission condition of the encrypted contents, and

the inactive license includes combined metadata describing an album with contents to be packaged in addition to the cryptography key and the permission condition.