qkd_bb84_simulator.py — Professional BB84 Quantum Key Distribution Simulator
qkd_bb84_simulator.py — Professional BB84 Quantum Key Distribution Simulator
qkd_bb84_simulator.py v1.3 — Professional BB84 Quantum Key Distribution Simulator Features • Zero extra setup — single file (only NumPy) • Complete BB84 protocol with basis sifting and error checking • Realistic depolarizing channel + photon loss (standard 0.2 dB/km fiber model) • Intercept-Resend eavesdropping with rigorous information-theoretic bound • Asymptotic secure key rate via binary entropy (Shor-Preskill style: 1 - 2h(QBER) - I_Eve) • Privacy amplification via XOR folding (toy universal hashing) • Generates final provably secure key • High-resolution plot: secure key rate vs. fiber distance (independent simulations per point) • Exports detailed statistics + secure key to JSON/CSV Dependencies • Requires numpy (>=1.21.0) — standard in scientific Python • matplotlib (>=3.5.0) optional for --plot Intended for cryptographers, quantum network engineers, and financial security teams designing provably secure quantum communication systems — provides accurate modeling of key rates, eavesdropping detection, and distance limitations that motivate quantum repeater development. Real usage: python qkd_bb84_simulator.py --bits 200000 --error_rate 0.015 --eve_present --verbose --plot python qkd_bb84_simulator.py --bits 100000 --loss_prob 0.3 --output qkd_results.json Made by Britt (2025) — MIT License
post-quantum security, information reconciliation, secure key rate, quantum key distribution, QKD, secure communication, eavesdropping simulation, privacy amplification, quantum finance, cli tool, python, binary entropy, shor-preskill proof, quantum repeater, BB84, intercept-resend attack, quantum cryptography, quantum network
post-quantum security, information reconciliation, secure key rate, quantum key distribution, QKD, secure communication, eavesdropping simulation, privacy amplification, quantum finance, cli tool, python, binary entropy, shor-preskill proof, quantum repeater, BB84, intercept-resend attack, quantum cryptography, quantum network
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