Large payload quantum steganography based on cavity quantum electrodynamics  

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4期110-117,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. LQ12F02012 and Y6100421)

摘　　要：A large payload quantum steganography protocol based on cavity quantum electrodynamics （QED） is presented in this paper, which effectively uses the evolutionary law of atoms in cavity QED. The protocol builds up a hidden channel to transmit secret messages using entanglement swapping between one GHZ state and one Bell state in cavity QED together with the Hadamard operation. The quantum steganography protocol is insensitive to cavity decay and the thermal field. The capacity, imperceptibility and security against eavesdropping are analyzed in detail in the protocol. It turns out that the protocol not only has good imperceptibility but also possesses good security against eavesdropping. In addition, its capacity for a hidden channel achieves five bits, larger than most of the previous quantum steganography protocols.A large payload quantum steganography protocol based on cavity quantum electrodynamics （QED） is presented in this paper, which effectively uses the evolutionary law of atoms in cavity QED. The protocol builds up a hidden channel to transmit secret messages using entanglement swapping between one GHZ state and one Bell state in cavity QED together with the Hadamard operation. The quantum steganography protocol is insensitive to cavity decay and the thermal field. The capacity, imperceptibility and security against eavesdropping are analyzed in detail in the protocol. It turns out that the protocol not only has good imperceptibility but also possesses good security against eavesdropping. In addition, its capacity for a hidden channel achieves five bits, larger than most of the previous quantum steganography protocols.

关 键 词：quantum steganography hidden capacity entanglement swapping Hadamard operation cavity QED 

分 类 号：O413[理学—理论物理] TN918.1[理学—物理]