The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 02, 2015
Filed:
Sep. 14, 2010
Jun Noda, Minato-ku, JP;
Jun Noda, Minato-ku, JP;
NEC CORPORATION, Tokyo, JP;
Abstract
In order to reduce the frequency with which communication occurs when updating a network key is reduced and minimize the deterioration in performance due to updating without relying on a key tree, a server is provided with an address key allocation unit which generates identifiers for identifying clients by the combination of addresses on a plurality of address spaces and allocates address keys to respective addresses included in the generated identifier, and a network key ciphering unit which generates a network key update key which cannot be generated from the address keys allocated to a client to be disconnected, ciphers a new network key using the network key update key, and delivers the new network key to the clients.