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:
Nov. 12, 2024
Filed:
Jun. 23, 2020
Hitachi, Ltd., Tokyo, JP;
Tatsuya Maruyama, Tokyo, JP;
Noritaka Matsumoto, Tokyo, JP;
Hiroshi Iwasawa, Tokyo, JP;
Hiromichi Endoh, Tokyo, JP;
Junya Fujita, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
Conventional security measures are generally intended for an IT system, and it has been difficult to satisfy a real-time property and availability requested to a control system. Furthermore, since a time-division type time slot communication method is not taken into consideration, such time slot communication has problems in efficient utilization of computer resources and decrease in availability. In order to solve the above-described problems, the present invention specifies a time slot from characteristics of a communication packet received by a reception unitby using a time slot characteristic storage unit, and selects, in accordance with the specified time slot, an inspection pattern stored in an inspection pattern storage unitby using an inspection pattern selection unit