SCS-QBCT: A Supply Chain System-Driven Efficient Quantum Blockchain Cross-Chain Transaction Scheme

The development of supply chain systems demands optimization of various technologies in terms of efficiency and resource conservation. As an emerging technology, cross-chain technology in blockchain aims to achieve interoperability and resource sharing between different blockchain networks, enhancing data liquidity and system efficiency. However, relay chains in cross-chain interactions require storing a large number of transaction records, leading to excessive communication and storage loads, which can cause network performance degradation, storage resource exhaustion, and low transaction processing efficiency. To address these issues, this paper proposes a supply chain system-driven efficient quantum blockchain cross-chain transaction scheme (SCS-QBCT). Firstly, SCS-QBCT uses the quantum Fourier transform (QFT) to convert transaction records on relay chains from the time domain to the frequency domain, reducing data redundancy and significantly lowering storage space consumption. Secondly, a multifunctional smart contract, designed to include conventional functions, enables value transfer, transaction withdrawal, transaction query, node identity management, and transaction type identification. Furthermore, inverse quantum Fourier transform (IQFT) is used to restore quantum state transaction records in blocks to classical records, supporting transaction query requests. Finally, the experimental results and theoretical analysis show that SCS-QBCT performs excellently in reducing storage consumption, improving system efficiency, practicality, and security, and meeting the optimization goals of supply chain systems.