Information Technology Reference
In-Depth Information
The definition of the information capsule system structures we are looking at are:
3. The entities are the information capsule agent which manage the contents, the
access control agent which processes the contents for the user and the database
management agent at the author who create the contents.
4. The content are encrypted with the contents key issued by the database manage-
ment agent.
5. Database management agent with the extended Dublin Core (Yamada et al.
2007
) and access control list.
6. Content capsules containing software agents that control copyrights and access
authorization. The copyright material is stored in the database.
Furthermore, an anonymous communication between the owner and the user of
the contents should be supported if the entities needs anonymity. So the anonymous
routing system (Mambo et al.
1991
; Kinoshita and Morizumi
2008
) is required to
keep the privacy of entities.
Figure
12.3
shows the interaction of agents. An information capsule has several
components shown as follows.
• Encrypted Contents: The contents which encrypted with contents key managed
by the information capsule agent.
• Access Control Lists: The conditions for use of contents based on the extended
Dublin Core are stored and the structure of contents which shows the
components of the contents.
•
Information Capsule Agent : These multiple agents are contained because each
original contents has a information capsule agent.
12.4 Control of Distributed Information
The information capsule is used for DRM system (Nobukazu et al.
2003
). We
developed the concept of the information capsule to resolve complicated copyrights
and treat the private information. The information is encapsulated with metadata
and a mobile agent. The metadata includes routing and access control information.
The functions of agent are to resolve rights in information and to operate the access
control based on the rights.
12.4.1 Resolving Rights
The agent communicates with users and arbitrates the rights. Firstly, the agent tries
to arbitrate with the metadata. Next, if the agent cannot arbitrate independently,
it must communicate with a distributor based on the routing information. For
example, if the content is a second use consisting of multiple sources, each
copyright of source will be resolved.
