NODE DEVICE AND PROGRAM

专利名称：NODE DEVICE AND PROGRAM发明人：IWAO, Tadashige,MASUBUCHI,

Kentaro,NAKAJIMA, Chiaki,IKEMOTO,Kentaro,KOGA, Syunsuke,TAKAHASHI, Yuji

申请号：EP09733693.7申请日：20090424公开号：EP2273717A1公开日：20110112

专利附图：

摘要：In a first apparatus in a network constituted by a plurality of node apparatuses,an access key generation unit changes a first access key being a cryptographic key unique

to the first node apparatus at intervals of the first time. A shared key generation unitchanges a shared key being the same for the plurality of node apparatuses at intervals ofa second time. The first node apparatus encrypts, using the generated shared key, thegenerated first access key and transmits it, and receives an access key notification framethat is transmitted from the second node apparatus and that includes data obtained byencrypting a second access key of a second node apparatus using the shared key. Adecryption unit obtains the second access key by decrypting the received access keynotification frame using the generated shared key. A transmission unit transmits anencrypted frame obtained by encrypting, using the second access key, a plaintext frameto which signature data obtained by encrypting data including a hash value calculatedfrom the plaintext frame by the shared key is attached.

申请人：Fujitsu Limited

地址：1-1, Kamikodanaka 4-chome Nakahara-ku Kawasaki-shi, Kanagawa 211-8588 JP

国籍：JP

代理机构：Wilding, Frances Ward

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