Bidirectional Quantum Secure Direct Communication in Driven Cavity Qed

Abstract

A theoretical scheme of bidirectional quantum secure direct communication is proposed in the context of driven cavity QED. We first present an entanglement swapping scheme in cavities where two atoms without previous interaction can be entangled with a success probability of unity. Then, based on a novel property of entanglement swapping, we propose a bidirectional quantum secure direct communication protocol, in which two legitimate users can exchange their different secret messages simultaneously in a direct way. The probability of success in our scheme is 1.0. This scheme does not involve apparent (or direct) Bell-state measurements and is insensitive to the cavity decay and the thermal field.

Fault-tolerant authenticated quantum dialogue using logical Bell states

“…Compared with the previous QD protocols [12][13][14][15][16][17][18][19][20][21][22][23][24][28][29][30][31][32][33][34][35][36][37][38][39][40]42,[53][54][55][56][57][58][59][60][61], the great merit of the two proposed protocols is that each of them can accomplish the mutual identity authentication and the dialogue between two participants simultaneously and securely over one kind of collective noise channels under the assumption that the information transmitted through the classical channel is eavesdroppable and modifiable. Their other characteristics are:…”

A Kind of Quantum Dialogue Protocols Without Information Leakage Assisted by Auxiliary Quantum Operation

“…Since it was independently suggested by Zhang et al [1,2] and Nguyen [3] in 2004, a lot QD protocols [4][5][6][7][8][9][10][11][12][13] had been proposed by many scholars. However, Tan and Cai [14] found out in 2008 that there may exist "classical correlation" in QD.…”

Large Payload Bidirectional Quantum Secure Direct Communication Without Information Leakage

“…In 2008, Gao et al 27 pointed out from the viewpoint of information theory and cryptography that both Jin's protocol 20 and Man's improved version 24 have the information leakage problem; Gao et al 28 pointed out that all of Nguyen's protocol, 18 Man's protocol, 19 Ji's protocol 22 and Man's protocol 23 also have the information leakage problem; Tan and Cai 29 analyzed the information leakage problem in Nguyen' protocol 18 from the viewpoint of Holevo Bound. In 2009, Shan et al 30 put forward a quantum dialogue protocol based on entanglement swapping of two Bell states via cavity Quantum electro-dynamics (QED); Shi et al 31 proposed a BQSDC without information leakage based on a normal Bell state and an auxiliary Bell state. In 2010, Shi et al 32 proposed a quantum dialogue protocol without information leakage based on a single photon and an auxiliary single photon; Shi 33 proposed a BQSDC using the correlation extractability of Bell state and an auxiliary particle to overcome the information leakage problem; Gao 34 proposed two quantum dialogue protocols without information leakage based on entanglement swapping between two Bell states.…”