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:
Jan. 31, 2017
Filed:
May. 27, 2015
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Masaharu Kako, Toukai, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A monitoring device to operate as a first monitoring device in a network including communication devices and monitoring devices, the monitoring device includes: an acquisition unit to acquire information of packets transmitted or received by a first communication device monitored by the first monitoring device; a transmission unit to transmit a first join request message to a first multicast group in which a second monitoring device performs notification of communication information of a second communication device monitored by the second monitoring device, when the first communication device communicates with the second communication device, after the first communication device communicates with an external device not included in the network; and a determination unit to determine whether the external device is performing unauthorized access to the second communication device via the first communication device, based on packets transmitted from the second monitoring device to the first multicast group.