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ENCRYPTED CONTROL SYSTEM, ENCRYPTED CONTROL METHOD, AND ENCRYPTED CONTROL PROGRAM
ENCRYPTED CONTROL SYSTEM, ENCRYPTED CONTROL METHOD, AND ENCRYPTED CONTROL PROGRAM
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机译:加密控制系统,加密控制方法和加密控制程序
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摘要
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.
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