Implementing Homomorphic Encryption Based Secure Feedback Control for Physical Systems
This addresses security concerns in control systems for physical applications, but it is incremental as it applies an existing encryption method to a specific domain.
The paper tackled secure feedback control for physical systems by implementing linear dynamic controllers, including PID types, using Paillier's homomorphic encryption, with experimental results on an inverted pendulum controller showing timing analysis and resource usage for different key lengths.
This paper is about an encryption based approach to the secure implementation of feedback controllers for physical systems. Specifically, Paillier's homomorphic encryption is used to digitally implement a class of linear dynamic controllers, which includes the commonplace static gain and PID type feedback control laws as special cases. The developed implementation is amenable to Field Programmable Gate Array (FPGA) realization. Experimental results, including timing analysis and resource usage characteristics for different encryption key lengths, are presented for the realization of an inverted pendulum controller; as this is an unstable plant, the control is necessarily fast.