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:
Sep. 30, 2014
Filed:
Feb. 14, 2013
Hitachi, Ltd., Tokyo, JP;
Hiromichi Endoh, Hitachi, JP;
Tsutomu Yamada, Hitachinaka, JP;
Junya Fujita, Hitachinaka, JP;
Satoshi Okubo, Kasama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The objective of the present invention is to provide a security monitoring system and a security monitoring method which is capable of a quick operation when an unauthorized access, a malicious program, and the like are detected, while the normal operation of the control system is not interrupted by an erroneous detection. The security monitoring systemobtains communication packets in segmentswhich constitutes a control system, and extracts a communication packet which has a characteristic value different from a normal value among the obtained communication packets to generate communication event information. The security monitoring systempredicts a degree of influence on the control systemby the communication packet extracted as the communication event informationby verifying the communication event informationwith event patterns which indicate characteristics of the unauthorized access and the like.