Blind quantum computation protocol in which Alice only makes measurements

TL;DR

This paper introduces a new blind quantum computation protocol where Alice only performs measurements, simplifying her role and enhancing security by relying on the no-signaling principle and device independence.

Contribution

It proposes a measurement-only blind quantum computation protocol that reduces Alice's technological requirements and is secure based on fundamental physical principles.

Findings

Protocol enables Alice to perform only measurements, simplifying implementation.

Security is based on the no-signaling principle, not just quantum physics.

Protocol is device independent, not requiring trust in measurement devices.

Abstract

Blind quantum computation is a new secure quantum computing protocol which enables Alice who does not have sufficient quantum technology to delegate her quantum computation to Bob who has a fully-fledged quantum computer in such a way that Bob cannot learn anything about Alice's input, output, and algorithm. In previous protocols, Alice needs to have a device which generates quantum states, such as single-photon states. Here we propose another type of blind computing protocol where Alice does only measurements, such as the polarization measurements with a threshold detector. In several experimental setups, such as optical systems, the measurement of a state is much easier than the generation of a single-qubit state. Therefore our protocols ease Alice's burden. Furthermore, the security of our protocol is based on the no-signaling principle, which is more fundamental than quantum physics. Finally, our protocols are device independent in the sense that Alice does not need to trust her measurement device in order to guarantee the security.