Quantum Resonance near Optimal Eavesdropping in Quantum Cryptography

TL;DR

This paper identifies a resonance phenomenon in disturbance levels during near-optimal eavesdropping in quantum cryptography, suggesting it enhances security against such attacks.

Contribution

It reveals a resonance behavior in disturbance near optimal eavesdropping strategies, providing new insights into quantum cryptography security.

Findings

Resonance behavior occurs near optimal eavesdropping strategies.

The resonance effect diminishes when strategies are far from optimal.

This phenomenon potentially increases security in quantum cryptography.

Abstract

We find a resonance behavior in the disturbance when an eavesdropper chooses a near-optimal strategy intentionally or unintentionally when the usual Bennett-Brassard cryptographic scheme is performed between two trusted parties. This phenomenon tends to disappear when eavesdropping strategy moves far from the optimal one. Therefore, we conjecture that this resonant effect is a characteristic for the eavesdropping strategy near to optimal one. We argue that this effect makes the quantum cryptography more secure against the eavesdropper's attack.