Quantum-Secure Consensus Algorithms are revolutionizing secure communication and data processing by providing unconditional security without relying on a central authority. Decentralized quantum systems, integrating blockchain technology with Quantum Key Distribution (QKD) protocols, have been shown to be feasible in various studies. QKD protocols like BB84 and Ekert91 provide unconditional security for cryptographic key exchange between two parties. However, these protocols rely on trusted central authorities, which can be a single point of failure. Decentralized quantum systems aim to overcome this limitation by utilizing blockchain technology to create distributed and secure networks for QKD. Researchers have proposed various approaches to optimize key management in DQKD networks, including hierarchical key structures and parallel key distribution protocols.
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