Wu Wanqing, Wu Jiahui, Guo Lingna
School of Cyber Security and Computer, Hebei University, Baoding 071002, China.
Key Laboratory on High Trusted Information System in Hebei Province, Hebei University, Baoding 071002, China.
Entropy (Basel). 2023 Aug 2;25(8):1156. doi: 10.3390/e25081156.
Multi-party quantum private comparison (MQPC) assumes responsibility for overseeing the flow of data and communication among diverse entities, wherein it boasts powerful security capabilities that have garnered substantial attention. Most current MQPC protocols rely on difficult-to-prepare quantum states and are inefficient in their use of resources. In this paper, we propose a novel MQPC protocol without entanglement swapping, thereby building upon the assumption of an ideal channel. This protocol is based on Bell states, which simplifies implementation and addresses the challenges associated with using complex quantum states; it also enables the comparison of secret information by having a trusted party prepare and transmit encoded quantum sequences to participants, thereby facilitating efficient equality comparison among all parties. Our MQPC protocol showcased remarkable efficiency in comparison to existing protocols for quantum private comparison. Furthermore, the incorporation of decoy photon and shared key technologies made external and internal attacks ineffective, thereby ensuring the utmost security and integrity of the protocol.
多方量子私密比较（MQPC）负责监督不同实体之间的数据和通信流，它具有强大的安全能力，因而备受关注。当前大多数MQPC协议依赖于难以制备的量子态，且资源利用效率低下。在本文中，我们提出了一种无需纠缠交换的新型MQPC协议，该协议基于理想信道的假设。此协议基于贝尔态，简化了实现过程，并解决了使用复杂量子态所带来的挑战；它还通过让可信方制备并向参与者传输编码量子序列，实现了秘密信息的比较，从而便于各方之间进行高效的相等性比较。与现有的量子私密比较协议相比，我们的MQPC协议展现出了显著的效率。此外，诱饵光子和共享密钥技术的引入使得外部和内部攻击均无效，从而确保了协议的最高安全性和完整性。
