Experimental Examination of Secure Two-Party Controller Computation

2026-05-11

AI Summary

This work addresses the real-time challenges of long-term operation in two-party secure computation for dynamic controllers by proposing a secret sharing–based secure two-party computation protocol. The protocol enables stable control over an infinite time horizon without decrypting the controller state, resetting the system, or re-encrypting inputs. It represents the first implementation of long-term secure dynamic control in a real-world commercial cloud environment that avoids state decryption, thereby overcoming the performance bottlenecks inherent in traditional homomorphic encryption approaches. Deployment on a cloud platform and experimental validation using an inverted pendulum demonstrate that the system maintains real-time stability despite online communication overhead, confirming the feasibility and practicality of the proposed method.

Abstract

A secure two-party computation protocol for running dynamic controllers over secret sharing has recently been proposed. Unlike encrypted control schemes based on homomorphic encryption, this protocol enables operating dynamic controllers for an infinite time horizon without controller-state decryption, controller-state reset, or input re-encryption. However, the two-party setting introduces additional online communication between the computing parties, which may hinder real-time feasibility. In this study, we demonstrate the feasibility of the protocol through implementation on a commercial cloud platform with an inverted pendulum testbed. Experimental results show that the proposed protocol successfully stabilized the pendulum despite the online communication overhead.

Problem

• secure two-party computation
• dynamic controllers
• online communication
• real-time feasibility
• inverted pendulum

Innovation

• secure two-party computation
• secret sharing
• encrypted control
• dynamic controller
• real-time feasibility