Prospects for device-independent quantum key distribution

TL;DR

This paper reviews the prospects of device-independent quantum key distribution, focusing on security proofs and techniques to enhance key rates and noise tolerance, aiming to advance practical implementation.

Contribution

It provides new security proofs and combines techniques like noisy preprocessing and advantage distillation to improve DIQKD protocols.

Findings

Enhanced security proofs for DIQKD protocols.

Finite-size security proofs based on combined techniques.

Improved key rates and noise tolerance in DIQKD.

Abstract

Device-independent quantum key distribution (DIQKD) aims to achieve secure key distribution with only minimal assumptions, by basing its security on the violation of Bell inequalities. While this offers strong security guarantees, it comes at the cost of being challenging to implement experimentally. In this thesis, we present security proofs for several techniques that help to improve the keyrates and noise tolerance of DIQKD, such as noisy preprocessing, random key measurements, and advantage distillation. We also show finite-size security proofs for some protocols based on combining several of these techniques. These results and proof techniques should be useful for further development of DIQKD protocols.