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Kosari, Arash. (1404). Enhancing Ack QKD with Decoy States for Device Independent Security. فناوری آموزش, 14(2), 403-410. doi: 10.22061/jecei.2025.12392.873
Arash Kosari. "Enhancing Ack QKD with Decoy States for Device Independent Security". فناوری آموزش, 14, 2, 1404, 403-410. doi: 10.22061/jecei.2025.12392.873
Kosari, Arash. (1404). 'Enhancing Ack QKD with Decoy States for Device Independent Security', فناوری آموزش, 14(2), pp. 403-410. doi: 10.22061/jecei.2025.12392.873
Kosari, Arash. Enhancing Ack QKD with Decoy States for Device Independent Security. فناوری آموزش, 1404; 14(2): 403-410. doi: 10.22061/jecei.2025.12392.873

Enhancing Ack QKD with Decoy States for Device Independent Security

Journal of Electrical and Computer Engineering Innovations (JECEI)
مقاله 9، دوره 14، شماره 2، مهر 2026، صفحه 403-410    اصل مقاله (1.03 M)
نوع مقاله: Original Research Paper
شناسه دیجیتال (DOI): 10.22061/jecei.2025.12392.873
نویسنده
Arash Kosari*
Department of Electrical Engineering and Information Technology, Iranian Research Organization for Science & Technology (IROST), Tehran, Iran.
تاریخ دریافت: 24 مرداد 1404،  تاریخ بازنگری: 28 مهر 1404،  تاریخ پذیرش: 18 آبان 1404 
چکیده
Background and Objectives: Quantum Key Distribution (QKD) ensures secure communication through quantum mechanics, but real-world implementations face vulnerabilities from detector blinding, time-shift, and side-channel attacks. While Measurement-Device-Independent QKD (MDI-QKD) mitigates detector vulnerabilities, it lacks real-time attack monitoring and struggles with finite-key limitations. This study presents an MDI ack QKD protocol that integrates deterministic acknowledgment pulses and multi-intensity decoy states to achieve robust, device-independent security with real-time attack detection.
Methods: The proposed protocol combines MDI-QKD’s device-independent framework with interleaved deterministic acknowledgment pulses and four-level decoy intensities. Alice and Bob generate weak coherent pulses with randomized phases, embedding acknowledgment pulses with probability ( Pd = 0.1 ) to probe channel integrity. An untrusted relay performs Bell-state measurements using superconducting nanowire single-photon detectors (SNSPDs). Multi-intensity decoy statistics enable finite-key parameter estimation, while integrated photonic platforms ensure scalability. Security is analyzed using the universally composable framework, with simulations and preliminary experiments conducted over metropolitan fiber distances.
Results: Numerical simulations demonstrate secure key rates exceeding 10 Mbps at 50 km and ~1 Mbps at 100 km under realistic conditions (0.2 dB/km fiber loss, 85% detector efficiency, 1 GHz pulse rate). Experimental tests on an integrated photonic chip at 1550 nm achieved raw key rates of 1.1 Mbps at 50 km with decoy accuracy within ±7%. Deterministic acknowledgments detected blinding attacks with high sensitivity, and multi-intensity decoys provided tight finite-key bounds, maintaining composable security against collective and coherent attacks.
Conclusion: The MDI ack QKD protocol achieves high-rate, device-independent quantum key distribution with real-time attack monitoring, offering a scalable solution for metropolitan quantum networks. Its compatibility with integrated photonics enables compact, stable implementations, while deterministic acknowledgments and multi-intensity decoys ensure robust security against evolving threats. This approach paves the way for practical, unconditionally secure communication systems, with potential for satellite-ground and multi-node network extensions.
کلیدواژه‌ها
MDI-QKD؛ Detector Blinding؛ Integrated Photonics؛ Finite-Key Security؛ Side-Channel Attacks
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