My study involves four areas in quantum communication, i.e., quantum key distri-bution (QKD), quantum secure direct communication (QSDC), quantum secret sharing(QSS) and quantum source coding.

• 本博士论文主要涉及了量子通信的四个方面,即量子密钥分配、量子安全直接通信、量子机密共享和量子信源编码。