Quantum Key Distribution with BB84: simulation and QBER analysis using Qiskit
DOI:
https://doi.org/10.5753/reic.2026.8121Keywords:
Quantum Cryptography, Quantum Key Distribution, BB84, QBER, Simulation, Information SecurityAbstract
Quantum computing challenges the security of classical cryptographic systems, motivating the adoption of approaches such as Quantum Key Distribution (QKD). This work analyzes the BB84 protocol using simulation, focusing on the relationship between interception rate and the Quantum Bit Error Rate (QBER). Results show a progressive increase in QBER as interception grows, approaching the theoretical limit of 25% under full interception. Intermediate levels are sufficient to compromise key security. The study suggests QBER as a promising indicator of eavesdropping within the simulated context and provides a reproducible approach for analyzing QKD protocols. The simulation source code is publicly available at: https://github.com/lupetenazzi/quantum-cryptography-bb84.
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