Noise Analysis for two Quantum Cryptography Protocols

TL;DR

This paper analyzes noise effects in two quantum cryptography protocols, highlighting their advantages in low-intensity laser systems and modeling errors as independent, uniformly distributed noise across links.

Contribution

It introduces a noise model for two and three-stage quantum cryptographic protocols based on polarization rotations, emphasizing their robustness in specific laser systems.

Findings

Noise modeled as uniform distribution over small error range

Protocols show advantages in low intensity laser systems

Errors in different links are considered independent

Abstract

This paper presents noise analysis for the two-stage and the three-stage quantum cryptographic protocols based on random polarization rotations. The noise model used is that of uniform distribution of error over a certain small range that is associated with each link without regard for the source of the error. The noise in different links is taken to be independent. Advantages of the use of these protocols in low intensity laser systems are given.