Lingli Chen

Quantum message authentication (QMA) plays a crucial role in quantum cryptography, which ensures the authenticity and integrity of transmitted quantum messages. However, most existing QMA protocols suffer from high quantum resource consumption and exhibit low communication efficiency in large-scale quantum networks. To overcome these challenges, we first design an efficient quaternion authentication code that reduces the number of required trap qubits. Based on this, we then propose a dynamically adjustable multi-party QMA protocol with identifiable abort, capable of detecting malicious participants when the protocol terminates with the aid of a semi-quantum trusted third party (SQ-TTP). Furthermore, by the combined use of dynamic grouping and parallel transmission mechanisms, the proposed protocol significantly reduces the consumption of resources including keys and trap qubits. These advancements make the proposed protocol offer a more efficient and practical solution for QMA in large-scale quantum communication networks.