Robust EPR-pairs-based quantum secure communication with authentication resisting collective noise  

作　　者：CHANG Yan ZHANG ShiBin LI Jian YAN LiLi 

机构地区：[1]Department of Network Engineering, Chengdu University of Information Technology [2]School of Computer, Beijing University of Posts and Telecommunications

出　　处：《Science China(Physics,Mechanics & Astronomy)》2014年第10期1907-1912,共6页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the Science and Technology Support Project of Sichuan Province of China(Grant No.2013GZX0137);the Fund for Young Persons Project of Sichuan Province of China(Grant No.12ZB017);the National Natural Science Foundation of China(Grant No.61100205);the Project of the Fundamental Research Funds for the Central Universities of China(Grant No.2013RC0307);the Cryptography Basic Development of the National"Twelfth Five-Year Plan" of China on Cryptographic Theory(Grant No.MMJJ201301004)

摘　　要：This work presents two robust quantum secure communication schemes with authentication based on Einstein-Podolsky-Rosen(EPR) pairs, which can withstand collective noises. Two users previously share an identity string representing their identities. The identity string is encoded as decoherence-free states(termed logical qubits), respectively, over the two collective noisy channels, which are used as decoy photons. By using the decoy photons, both the authentication of two users and the detection of eavesdropping were implemented. The use of logical qubits not only guaranteed the high fidelity of exchanged secret message, but also prevented the eavesdroppers to eavesdrop beneath a mask of noise.This work presents two robust quantum secure communication schemes with authentication based on Einstein-Podolsky-Rosen （EPR） pairs, which can withstand collective noises. Two users previously share an identity string representing their identities. The identity string is encoded as decoherence-free states （termed logical qubits）, respectively, over the two collective noisy channels, which are used as decoy photons. By using the decoy photons, both the authentication of two users and the detection of eavesdropping were implemented. The use of logical qubits not only guaranteed the high fidelity of exchanged secret mes- sage, but also prevented the eavesdroppers to eavesdrop beneath a mask of noise.

关 键 词：quantum secure direct communication AUTHENTICATION fault tolerant collective noise 

分 类 号：TN918[电子电信—通信与信息系统] O413[电子电信—信息与通信工程]