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:
Dec. 07, 2021
Filed:
Oct. 19, 2018
The University of Electro-communications, Chofu, JP;
Kiminao Kogiso, Chofu, JP;
Takashi Suzuki, Chofu, JP;
THE UNIVERSITY OF ELECTRO-COMMUNICATIONS, Tokyo, JP;
Abstract
An encrypted control system, an encrypted control method, and an encrypted control program make it possible to further reduce a risk of a cipher key leaking. An input device, a plant-side control device, and a controller are respectively equipped with pseudorandom number calculation units having a common function, are time synchronized, and start a synchronized operation at the same time. Since the encrypted control system is configured in such a manner, it becomes possible to switch a pair of a public key and a private key in synchronization with a control cycle of the entire control system. Consequently, it becomes possible to instantaneously and definitely detect intervention in the control system by a malicious third party.