Keio University, Graduate School of Media and Governance
MAUI Project
Ph.D. Dissertation

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TITLE Autonomous and Distributed Content Information Management Architecture

The demand for content delivery with rights management has been growing. These contents are called ``High-valued Content''. In addition, the combined high-valued content distributed by various transmission media, which is called ``Structured Content'', has been advanced. Complexity of the content structure and increase of the stakeholders will give many problems in a content delivery environment.

Content information including content's meta-data or sender's information is required for receivers to access the content. However, the existing content delivery platforms are controlled by portal sites or applications themselves to deliver both content and content information. In this situation, users must access to each platform to retrieve content information. (Prob1: Division of Content Information)

In addition, in the existing platforms, the rights management is included in the content delivery platforms. This means that only certain stakeholders have access to rights management while small scale content holders and intermediate agents are excluded from content distribution. This situation prevents appearance of new stakeholders, reduces the freedom of rights management, or may even cause a negative impact on content distribution. (Prob2: Vertical integration of policy information)

In this research, we propose a content information management architecture model, called "GCR (Globally-distributed Content Repository) Model". This architecture realizes a cross-platform content information repository system. By this achievement, stakeholders can exchange the content information with rights management. The architecture promotes commercial distribution of high-value content. The security issues of distributed storage systems are also addressed by the Threshold Cryptography and Spreading Control.

The proposed architecture model achieved that the content information can be retrieved from our system that does not exclude the chance that any kind of stakeholder involves. Also the architecture model guarantees flexibility for the content delivery; it enables stakeholders to engage in the management of content information, and freely to manage content information on stakeholders' own role.

Keyword: Digital Media Content Streaming, Content Information Management, Rights Management, Autonomous and Distributed Data Storage, Information Protection

CONTACT To obtain the dissertation, please contact;
MISHIMA, Kazuhiro ( three at )

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