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Encrypted Control for Timed Discrete Event Systems Using Homomorphic Encryption
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DOI：10.1109/tac.2026.3687476.png)
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Abstract
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The rapid increase in networked cyber-physical system (CPS), especially in industrial environments, necessitates safe and secure communication. One possibility to increase the security of CPS is encryption. In this article, a controller encryption scheme for discrete event systems (DESs) is proposed that allows not only the encryption of the communication, but also the controller itself. The considered controller is modeled by a type of DES, namely, signal interpreted Petri nets (SIPNs). A new representation of SIPN controllers is presented, which allows the use of homomorphic encryption schemes to encrypt the controller parameters, the states, and the input and output information. To increase the range of applications to more types of DES, such as timed SIPN, it is shown how encrypted counters and encrypted timers can be realized. The encrypted controller scheme only requires encryption and decryption on the plant side. Thus, the data transmitted between controller and plant and the information inside the controller are more secure against eavesdropping attacks.
Keywords:
Controller encryption
cyber-physical systems (CPSs)
discrete event systems (DESs)
networked systems
security
Journal
IF:
7
Papers:
1.3W
Citations:
6.7W
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Cited Papers