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. 16, 2021
Filed:
Jun. 05, 2019
Nec Corporation of America, Herzlia, IL;
NEC Corporation Of America, Herzlia, IL;
Abstract
A computing device comprises a network element configured for receiving messages sent over a network from a control facility, a reduced instruction set computer processing circuitry comprising a central processing unit (CPU) and a secure hardware-implemented module adapted to verify that a signed PKI message is encoded in the received messages at a plurality of sequential intervals and to either switch the CPU from an operational state to a safe state, or prevent switching of the CPU from the safe state to the operational state, when a receipt of a signed PKI message is not verified in one of the sequential intervals. In the operational state, the CPU accesses a memory address space in the processing circuitry for executing software-based commands. In the safe state the CPU is prevented from executing the software-based commands while access to the memory address space is retained.