Quantum-enhanced Secure Delegated Classical Computing

TL;DR

This paper introduces a quantum protocol enabling unconditionally secure delegated classical computation with limited client and server capabilities, surpassing classical-only methods and feasible with current quantum technology.

Contribution

It demonstrates that quantum resources can enable secure delegated classical computation with minimal quantum gadgets, extending prior correlation-based computational power results to security.

Findings

Quantum protocol achieves unconditional security for delegated classical computing.

Classical-only protocols cannot accomplish the same task.

Protocol is implementable with current quantum technology.

Abstract

We present a quantumly-enhanced protocol to achieve unconditionally secure delegated classical computation where the client and the server have both limited classical and quantum computing capacity. We prove the same task cannot be achieved using only classical protocols. This extends the work of Anders and Browne on the computational power of correlations to a security setting. Concretely, we present how a client with access to a non-universal classical gate such as a parity gate could achieve unconditionally secure delegated universal classical computation by exploiting minimal quantum gadgets. In particular, unlike the universal blind quantum computing protocols, the restriction of the task to classical computing removes the need for a full universal quantum machine on the side of the server and makes these new protocols readily implementable with the currently available quantum technology in the lab.