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<p>The SARG04 quantum key distribution (QKD) protocol enhances secure communication by addressing vulnerabilities in the foundational BB84 protocol, particularly against photon-number-splitting (PNS) attacks. Utilizing quantum mechanics principles such as the no-cloning theorem, SARG04 employs state-pair announcements to bolster security. Simulations demonstrate the protocol's capability to generate secure keys of varying lengths, such as 5 bits, 24 bits, and 52 bits, depending on the number of transmitted qubits and matching bases between Alice and Bob. In one scenario, with 50 transmitted qubits, 24 matching bases resulted in a secure shared key of 24 bits, while another simulation with 100 qubits produced a 52-bit key. The protocol leverages photonic states (e.g., polarization or phase) transmitted via optical fibers or waveguides, supported by advancements in photonic components like silicon waveguides and single-photon detectors. These components ensure high transmission efficiency and accurate state measurements. The SARG04 protocol demonstrates robust security and efficiency, particularly for long-distance QKD, where it maintains performance despite optical losses and noise, highlighting its suitability for real-world quantum communication systems.</p>

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Performance evaluation of the SARG04 protocol for photonic quantum key distribution in quantum computing

  • 期刊论文

  • 发表日期：

    2025年4月7日

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  • Gopinath Palai

摘要

The SARG04 quantum key distribution (QKD) protocol enhances secure communication by addressing vulnerabilities in the foundational BB84 protocol, particularly against photon-number-splitting (PNS) attacks. Utilizing quantum mechanics principles such as the no-cloning theorem, SARG04 employs state-pair announcements to bolster security. Simulations demonstrate the protocol's capability to generate secure keys of varying lengths, such as 5 bits, 24 bits, and 52 bits, depending on the number of transmitted qubits and matching bases between Alice and Bob. In one scenario, with 50 transmitted qubits, 24 matching bases resulted in a secure shared key of 24 bits, while another simulation with 100 qubits produced a 52-bit key. The protocol leverages photonic states (e.g., polarization or phase) transmitted via optical fibers or waveguides, supported by advancements in photonic components like silicon waveguides and single-photon detectors. These components ensure high transmission efficiency and accurate state measurements. The SARG04 protocol demonstrates robust security and efficiency, particularly for long-distance QKD, where it maintains performance despite optical losses and noise, highlighting its suitability for real-world quantum communication systems.