Node distributed with group key and group key updating

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United States of America Patent

PATENT NO 8855306
SERIAL NO

13332998

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Abstract

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According to one embodiment, a node that is a root node of a network forming a directed acyclic graph topology, which is composed of plural nodes including the node serving as the root node and having a parent-child relationship among nodes of adjacent hierarchies, includes a generating unit, an encrypting unit, and a transmitting unit. The generating unit generates a group key, and a list indicating a first node to which a distribution of the group key is inhibited. The encrypting unit encrypts the group key so as to be capable of being decrypted by a first child node other than the first node out of the child nodes of the root node. The transmitting unit transmits a first message, including an encrypted group key, which is the group key that is encrypted with respect to the first child node, and the list.

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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, JP 104 1916
Tanaka, Yasuyuki Kanagawa, JP 245 1761
Yamanaka, Shinji Tokyo, JP 32 255

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