# Optimization of Measurement Device Independent Scarani-Ac\`{i}n-Ribordy-Gisin protocol

## TL;DR

This paper optimizes the measurement device independent SARG04 quantum key distribution protocol to maximize secret key rate over distance, considering factors like error correction, dark counts, and quantum efficiency.

## Contribution

It provides an optimized version of the MDI-SARG04 protocol with improved secret key rate versus distance performance.

## Key findings

- Optimized secret key bitrate over communication distance.
- Analyzed impact of error correction, dark counts, and quantum efficiency.
- Enhanced protocol robustness against photon number splitting attacks.

## Abstract

The measurement device independent (MDI) Quantum Key Distribution (QKD) is a practically implementable method for transmitting secret keys between respective partners performing quantum communication. SARG04 (Scarani-Ac\`{i}n-Ribordy-Gisin 2004) is a protocol tailored to struggle against photon number splitting (PNS) attacks by eavesdroppers and its MDI-QKD version is reviewed and optimized from secret key bitrate versus communication distance point of view. We consider the effect of several important factors such as error correction function, dark counting parameter and quantum efficiency in order to achieve the largest key bitrate versus longest communication distance.