A device-independent protocol for XOR oblivious transfer

TL;DR

This paper introduces a fully device-independent quantum protocol for XOR oblivious transfer, enhancing security by removing assumptions about the trustworthiness of quantum devices used in the protocol.

Contribution

It presents the first device-independent quantum protocol for XOR oblivious transfer, ensuring security even with potentially compromised quantum devices.

Findings

Protocol is secure against device manipulation

Achieves cryptographic goals without trusting quantum devices

Advances practical quantum cryptography implementations

Abstract

Oblivious transfer is a cryptographic primitive where Alice has two bits and Bob wishes to learn some function of them. Ideally, Alice should not learn Bob's desired function choice and Bob should not learn any more than what is logically implied by the function value. While decent quantum protocols for this task are known, many become completely insecure if an adversary were to control the quantum devices used in the implementation of the protocol. In this work we give a fully device-independent quantum protocol for XOR oblivious transfer.