Root node and a computer readable medium

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8750511
APP PUB NO 20120243685A1
SERIAL NO

13231479

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Abstract

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A wireless mesh network includes a plurality of nodes to which a device key is assigned. The device key belongs to one of a plurality of groups. In a root node, a correspondence relationship between the nodes and the device key thereof, and a correspondence relationship between past join nodes and a device key thereof, are stored. When a new node in the wireless mesh network is detected as a past join node, the device key assigned to the past join node is assigned to the new node again. When the new node is not the past join node, a new device key is assigned to the new node. A cipher text is generated by encrypting a message using device keys assigned to the nodes and the new node. If the number of groups to which the device keys belong is fewer, a size of the cipher text is smaller.

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Patent Owner(s)

  • KABUSHIKI KAISHA TOSHIBA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Oba, Yoshihiro Kanagawa-ken, JP 104 1918
Tanaka, Yasuyuki Kanagawa-ken, JP 245 1769
Yamanaka, Shinji Tokyo, JP 32 257

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