Gate Teleportation-based Universal Blind Quantum Computation

TL;DR

This paper introduces GTUBQC, a novel gate teleportation-based protocol enabling secure, universal blind quantum computation with minimal client quantum capabilities and enhanced privacy through encrypted rotation angles.

Contribution

It presents the first gate teleportation-based universal blind quantum computation protocol that encrypts quantum gates via rotation angles, ensuring blindness and correctness.

Findings

GTUBQC can securely hide quantum gates using encrypted rotation angles.

The protocol is proven to be blind and correct.

GTUBQC can be applied to tasks like quantum Fourier transform.

Abstract

Blind quantum computation (BQC) allows that a client who has limited quantum abilities can delegate quantum computation to a server who has advanced quantum technologies but learns nothing about the client's private information. However, it still remains a challenge to directly encrypt quantum algorithms in circuits model. To solve the problem, we propose GTUBQC, the first gate teleportation-based universal BQC protocol. In this paper, we consider a scenario where a trusted center is responsible for preparing initial states, a client with the ability to perform X, Z does not require any quantum memory, and two servers conducting UBQC (universal BQC) and Bell measurements. GTUBQC can hide the universal quantum gates by encrypting the rotation angles, because arbitrary unitary operation can be decomposed into a combination of arbitrary rotation operators. We prove the blindness and correctness of GTUBQC, and apply our approach to other types of computational tasks, such as quantum Fourier transform.