Quantum steganography with a large payload based on dense coding and entanglement swapping of Greenberger-Horne-Zeilinger states  

作　　者：叶天语 蒋丽珍 

机构地区：[1]College of Information & Electronic Engineering,Zhejiang Gongshang University

出　　处：《Chinese Physics B》2013年第5期152-159,共8页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 60972071);the Natural Science Foundation of Zhejiang Province, China(Grant Nos. Y6100421 and LQ12F02012)

摘　　要：A quantum steganography protocol with a large payload is proposed based on the dense coding and the entanglement swapping of the Greenberger-Horne-Zeilinger （GHZ） states. Its super quantum channel is formed by building up a hidden channel within the original quantum secure direct communication （QSDC） scheme. Based on the original QSDC, secret messages are transmitted by integrating the dense coding and the entanglement swapping of the GHZ states. The capacity of the super quantum channel achieves six bits per round covert communication, much higher than the previous quantum steganography protocols. Its imperceptibility is good, since the information and the secret messages can be regarded to be random or pseudo-random. Moreover, its security is proved to be reliable.A quantum steganography protocol with a large payload is proposed based on the dense coding and the entanglement swapping of the Greenberger-Horne-Zeilinger （GHZ） states. Its super quantum channel is formed by building up a hidden channel within the original quantum secure direct communication （QSDC） scheme. Based on the original QSDC, secret messages are transmitted by integrating the dense coding and the entanglement swapping of the GHZ states. The capacity of the super quantum channel achieves six bits per round covert communication, much higher than the previous quantum steganography protocols. Its imperceptibility is good, since the information and the secret messages can be regarded to be random or pseudo-random. Moreover, its security is proved to be reliable.

关 键 词：quantum steganography quantum secure direct communication dense coding entanglementswapping 

分 类 号：O413.1[理学—理论物理]