A New Quantum Secure Direct Communication Scheme with Authentication

作者：Liu Dan^*; Pei Chang-Xing; Quan Dong-Xiao; Zhao Nan

来源：Chinese Physics Letters, 2010, 27(5): 050306.

DOI：10.1088/0256-307X/27/5/050306

• KEY DISTRIBUTION
• CRYPTOGRAPHY
• ENTANGLEMENT

A new quantum secure direct communication (QSDC) scheme with authentication is proposed based on polarized photons and EPR pairs. EPR pairs are used to transmit information, while polarized photons are used to detect Eve and their encoding bases are used to transmit authentication information. Alice and Bob have their own identity number which is shared by legal users only. The identity number is encoded on the bases of polarized photons and distilled if there is no Eve. Compared with other QSDC schemes with authentication, this new scheme is considerably easier and less expensive to implement in a practical setting.

• 单位
  西安电子科技大学; 综合业务网理论及关键技术国家重点实验室