Title:
ENCRYPTION KEY DELIVERY DEVICE AND ENCRYPTION KEY DELIVERY METHOD
Document Type and Number:
WIPO Patent Application WO/2008/029853
Kind Code:
A1
Abstract:
It is possible to provide an encryption key delivery device and an encryption
key delivery method capable of maintaining security intensity and performing
reliable and flexible communication. A generation unit formed by a fist phase
key mixer (210) and second phase key mixers (221-223) generates a packet encryption
key for each of packets to be transmitted to a plurality of radio reception terminals
by multicast or broadcast so as to encrypt the packet. A packet encryption key
holding unit (220) holds a plurality of packet encryption keys generated by the
generation unit for a plurality of continuous packets. A packet encryption
key delivery unit (260) delivers any one of the packet encryption keys held by
the packet encryption key holding unit (220) to one of the radio reception terminals
independently of the packet transmitted by multicast or broadcast.
Inventors:
SAKAIBARA, Kunihiko (())
Application Number:
JP2007/067331
Publication Date:
March 13, 2008
Filing Date:
September 05, 2007
Export Citation:
Assignee:
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1006, Oaza Kadoma Kadoma-sh, Osaka 01, 5718501, JP)
松下電器産業株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 5718501, JP)
松下電器産業株式会社 (〒01 大阪府門真市大字門真１００６番地 Osaka, 5718501, JP)
International Classes:
H04L9/08; H04L9/08
Attorney, Agent or Firm:
WASHIDA, Kimihito (5th Floor, Shintoshicenter Bldg.24-1, Tsurumaki 1-chom, Tama-shi Tokyo 34, 2060034, JP)
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