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:
Jul. 02, 2019
Filed:
May. 11, 2017
Hitachi, Ltd., Tokyo, JP;
Shugo Mikami, Tokyo, JP;
Hiroki Uchiyama, Tokyo, JP;
Satoshi Ohkubo, Tokyo, JP;
Kohhei Yamaguchi, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
A detection apparatusstores a determination list (A) for determining whether there is unauthorized communication, receives a communication packet (A) flowing in a control system, determines whether a valid data pattern in the determination list (A) and a data pattern relating to the communication packet (A) match each other. When the valid data pattern in the determination list (A) and the data pattern relating to the communication packet do not match each other, the detection apparatuscalculates a similarity degree between the valid data pattern in the determination list and the data pattern relating to the communication packet, and determines whether the similarity degree satisfies a predetermined condition. When the similarity degree is determined not to satisfy the predetermined condition, the detection apparatusdetermines that the communication packet (A) is an unauthorized communication packet.