Analysis of the Impact of Quantum Measurement Reliability on Performance and Security in Quantum Cryptography Protocols: An Experimental Study Using Quantum Gates
Abstract This research investigates the critical role of quantum measurement reliability in the performance and security of quantum cryptography protocols, specifically focusing on the impact of noisy intermediate-scale quantum (NISQ) devices. Through a series of experimental studies conducted using quantum gates on IBM quantum computers (ibm_brisbane and ibm_torino), we analyze how measurement errors affect key performance indicators such as Quantum Bit Error Rate (QBER) and state fidelity. Our findings demonstrate that even minor inaccuracies in quantum measurements can significantly compromise the security and efficiency of quantum key distribution (QKD) protocols. We provide a comprehensive statistical analysis of the experimental data, including confidence intervals and error propagation, to quantify these effects. Furthermore, we delve into potential attack models, such as intercept-resend and Trojan-horse attacks, and discuss their susceptibility to measurement imperfections. This study highlights the urgent need for robust error mitigation and correction techniques to ensure the practical viability and cryptographic strength of quantum communication systems in the evolving quantum era.
Abstract This research investigates the critical role of quantum measurement reliability in the performance and security of quantum cryptography protocols, specifically focusing on the impact of noisy intermediate-scale quantum (NISQ) devices. Through a series of experimental studies conducted using quantum gates on IBM quantum computers (ibm_brisbane and ibm_torino), we analyze how measurement errors affect key performance indicators such as Quantum Bit Error Rate (QBER) and state fidelity. Our findings demonstrate that even minor inaccuracies in quantum measurements can significantly compromise the security and efficiency of quantum key distribution (QKD) protocols. We provide a comprehensive statistical analysis of the experimental data, including confidence intervals and error propagation, to quantify these effects. Furthermore, we delve into potential attack models, such as intercept-resend and Trojan-horse attacks, and discuss their susceptibility to measurement imperfections. This study highlights the urgent need for robust error mitigation and correction techniques to ensure the practical viability and cryptographic strength of quantum communication systems in the evolving quantum era.
Quantum cryptography has emerged as a revolutionary technology for ensuring secure communication in the era of quantum computing. While existing research primarily focuses on theoretical frameworks and small-scale experimental setups, significant challenges remain in practical implementation, scalability, and security vulnerabilities. This study aims to bridge the gap between theory and real-world deployment by developing robust quantum cryptographic protocols that address key challenges such as noise management, side-channel attacks, and Trojan horse attacks. Additionally, we propose an optimized quantum key distribution (QKD) mechanism that ensures secure communication over long distances under realistic conditions. Our research integrates post-quantum cryptography with quantum cryptographic techniques to provide a hybrid security model that is resilient against both classical and quantum computing threats. By leveraging commercially available quantum hardware and advanced randomness extraction methods, this study contributes to the development of scalable, secure, and efficient quantum communication networks. The findings of this research will play a crucial role in advancing secure digital communication systems and fortifying data security in the post-quantum era.
Quantum cryptography has emerged as a revolutionary technology for ensuring secure communication in the era of quantum computing. While existing research primarily focuses on theoretical frameworks and small-scale experimental setups, significant challenges remain in practical implementation, scalability, and security vulnerabilities. This study aims to bridge the gap between theory and real-world deployment by developing robust quantum cryptographic protocols that address key challenges such as noise management, side-channel attacks, and Trojan horse attacks. Additionally, we propose an optimized quantum key distribution (QKD) mechanism that ensures secure communication over long distances under realistic conditions. Our research integrates post-quantum cryptography with quantum cryptographic techniques to provide a hybrid security model that is resilient against both classical and quantum computing threats. By leveraging commercially available quantum hardware and advanced randomness extraction methods, this study contributes to the development of scalable, secure, and efficient quantum communication networks. The findings of this research will play a crucial role in advancing secure digital communication systems and fortifying data security in the post-quantum era.
The present thesis aimed to evaluate the efficiency and resilience of quantum cryptographic systems against malicious attacks, with emphasis on Quantum Key Distribution (QKD).Initially, fundamental concepts of quantum computing and quantum inform ation were examined, such as qubits, superposition, entanglement, decoherence and quantum gates, in order to establish the necessary theoretical background for the reader.Subsequently, key QKD protocols, such as BB84, E91, B92, BBM92 and Decoy-State techniques, were analyzed and compared in terms of security, practical applicability, and sensitivity to different categories of attacks.The methodology of the thesis was based on bibliographic and comparative analysis, using evaluation metrics such as Quantum Bit Error Rate (QBER), secret key generation rate, throughput, transmission distance, and channel losses.The analysis showed that simple theoretical attacks, such as intercept-resend, are usually more easily detectable due to an increase in QBER, whereas practical implementation attacks, such as detector blinding, time-shift, trojan-horse and photon-number-splitting attacks, can be more dangerous because they exploit device imperfections and do not always cause an obvious increase in errors.In conclusion, the theoretical security of QKD protocols is strong; however, their actual efficiency depends on the quality of implementation, technological limitations and the balance between protection and the final rate of secure key generation.
Quantum Key Distribution (QKD) is a prominent solution to achieve proven secure data transmission between legitimate users despite any assumptions about the eavesdropper's computational power (given that the laws of quantum mechanics are correct). This remains true even under attacks by quantum computers. In recent years, there has been a great research interest in developing enhanced security constructions based on QKD. This is mainly driven by the envisioned threats of quantum computers to the traditional information security infrastructure based on public key cryptography. This research lies under the wide umbrella of the so-called post-quantum cryptography. However, for any QKD protocol, an accurate estimation of the Quantum Bit Error Rate (QBER) before the information reconciliation phase is crucial for both the efficiency and security perspectives. In spite of the importance of the QBER estimation step, the state-of-the-art literature still lacks a detailed investigation of the practical aspects of this issue. Therefore, this work aims to fill this research gap. An extension of the EnQuad simulator has been used to study the effect of QBER estimation on the efficiency and security of the BB84 QKD protocol for depolarizing quantum channels and individual Intercept/Resend Eve attacks. Various parameters affecting the QBER estimation process have been carefully investigated. Our evaluation has shown the significant importance of the QBER estimation step. Indeed, an empirical formula has been derived for calculating the required size of the sifted key subset (the so-called sharing rate) needed for the QBER estimation. This is a major contribution of the presented work.
Error mitigation is one of the key challenges in realising the full potential of quantum cryptographic protocols. Consequently, there is a lot of interest in adapting techniques from quantum error correction (QEC) to improve the robustness of quantum cryptographic protocols. In this work, we benchmark the performance of different QKD protocols on noisy quantum devices, with and without error correction. We obtain the secure key rates of BB84, B92 and BBM92 QKD protocols over a quantum channel that is subject to amplitude-damping noise. We demonstrate, theoretically and via implementations on the IBM quantum processors, that B92 is the optimal protocol under amplitude-damping and generalized amplitude-damping noise. We then show that the security of the noisy BBM92 protocol crucially depends on the type and the mode of distribution of an entangled pair. Finally, we implement an error-corrected BB84 protocol using dual-rail encoding on a noisy quantum processor, and show that the dual-rail BB84 implementation outperforms the conventional BB84 in the presence of noise. Our secure key rate calculation also takes into account the effects of CNOT imperfections on the error rates of the protocols.
This Quantum Cryptography, as a future generation cyber security protocol research, includes experimental data that have been gathered from publicly accessible quantum cryptographic experiments done by university research facilities and cyber security facilities. The data comprises performance records of Quantum Key Distribution (QKD) deployments across various network environments and networks. Critical parameters, including encryption success rates, error rates, latency, throughput, and QKD efficiency, were studied to ensure the security and reliability of quantum cryptographic protocols being implemented. Experimental setups, such as Qiskit and QuTech, are utilized in experiments that offer the functionality to simulate and test quantum cryptographic systems. Quantum circuit building, quantum protocol simulation, and performance monitoring against various network topologies are facilitated by these platforms. Moreover, the experimental setup utilized actual quantum key distribution hardware and secure communication channels to facilitate real-time experimentation. Visualization employed Matplotlib to produce histograms and 3D plots of the success rates, throughput, and latency. Statistical modeling was performed to estimate the correlation between network latency, quantum key efficiency, and error rates, thereby plotting the contribution of quantum cryptography to the security of modern communication infrastructure in the future. Theory and practice, as exemplified in experimentation with quantum-computing software and numerical modelling, converge in this article to introduce possible future limits on using quantum cryptography as a nascent next-generation paradigm for cybersecurity.