Key Rate of the B92 Quantum Key Distribution Protocol with Finite Qubits

TL;DR

This paper calculates the key rate for the B92 quantum key distribution protocol when only a finite number of qubits are used, filling a gap in existing research.

Contribution

It introduces a method to compute the key rate for B92 protocol with finite qubits using the Scarani-Renner security framework.

Findings

First finite-qubit key rate calculation for B92 protocol

Provides a practical approach for real-world quantum key distribution

Enhances understanding of security limits in finite settings

Abstract

The key rate of the B92 quantum key distribution protocol had not been reported before this research when the number of qubits is finite. We compute it by using the security analysis framework proposed by Scarani and Renner in 2008.