Cryptography – Communication system using cryptography – Wireless communication
Reexamination Certificate
2004-07-14
2009-11-24
Vu, Kimyen (Department: 2435)
Cryptography
Communication system using cryptography
Wireless communication
C726S004000, C726S018000, C380S247000, C380S248000, C455S410000, C455S411000
Reexamination Certificate
active
07623666
ABSTRACT:
A communication network system has a plurality of interconnected sub-networks, at least one mobile node having a care-of address dependent on a sub-network currently connected thereto and a home address independent of the connected sub-network, and a home agent. Upon detection of a sub-network connected to the mobile node, the latter determines a security method corresponding to the sub-network held in a node-side security application management table as a security method for ensuring the security for user data communicated between the mobile node and a home agent associated therewith. Then, the sub-network is notified to the home agent through a mobile node network signal. The home agent determines a security method corresponding to the sub-network from among security methods held in an agent-side security application management table as a security method used for ensuring the security for user data communicated between the home agent and the mobile node managed thereby.
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Japanese Patent Office issued a Japanese Office Action on Jan. 5, 2009, Application No. 2003-280589.
Harasaki Kazuhiko
Kitamura Hiroshi
Motoyoshi Shinichiro
Nagura Masataka
NEC Corporation
Shan April Y
Vu Kimyen
Young & Thompson
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