摘要
Quantum secure direct communication(QSDC)is a branch of quantum communication that transmits messages directly,rather than via a cryptographic key,in the quantum form[1-3].As communication security becomes ever important today,the early use of quantum-proof cryptography is considered capable of minimizing the future exposure[4].While quantum key distribution is regarded as such an approach,the potential of QSDC is also worth noting[4],and its rapid development has been witnessed in recent years[5-10].
