Secure and Private Implementation of Dynamic Controllers Using Semi-Homomorphic Encryption
This work addresses security and privacy concerns in control systems for applications like industrial automation or IoT, but it is incremental as it builds on existing encryption methods for a specific domain.
The paper tackled the problem of implementing dynamic controllers securely and privately using semi-homomorphic encryption, resulting in a method that ensures stability and optimizes performance by periodically resetting the controller state to prevent overflow or underflow.
This paper presents a secure and private implementation of linear time-invariant dynamic controllers using Paillier's encryption, a semi-homomorphic encryption method. To avoid overflow or underflow within the encryption domain, the state of the controller is reset periodically. A control design approach is presented to ensure stability and optimize performance of the closed-loop system with encrypted controller.