Device-Independent Oblivious Transfer from the Bounded-Quantum-Storage-Model and Computational Assumptions

TL;DR

This paper introduces a device-independent oblivious transfer protocol that is secure under bounded quantum storage and relies on self-testing and computational assumptions, reducing strict non-communication requirements.

Contribution

It presents a novel DIOT protocol that combines bounded-quantum-storage assumptions with self-testing and computational assumptions for enhanced security.

Findings

Protocol is everlastingly secure.

Reduces strict non-communication assumptions.

Utilizes self-testing with computational assumptions.

Abstract

We present a device-independent protocol for oblivious transfer (DIOT) and analyze its security under the assumption that the receiver's quantum storage is bounded during protocol execution and that the device behaves independently and identically in each round. We additionally require that, for each device component, the input corresponding to the choice of measurement basis, and the resulting output, is communicated only with the party holding that component. Our protocol is everlastingly secure and, compared to previous DIOT protocols, it is less strict about the non-communication assumptions that are typical from protocols that use Bell inequality violations; instead, the device-independence comes from a protocol for self-testing of a single (quantum) device which makes use of a post-quantum computational assumption.