Quantum security direct communication is based on quantum physics, combined with the classic communication theory .It become a new communication model, its transmission of information on the high efficiency, security has been more and more extensive attention.That is, since the beginning of this century, has been rapid developed.In this paper, we will describe several common quantum secure direct communication protocols and economic quantum secure direct communication network models theoretically.At the end of this paper, we will discuss and analyze the development and the future of quantum safety direct communication. Quantum Direct Communication Protocol Two-Step QSDC Protocol.The two-Step QSDC protocol uses the protocol of the entangled particle pair and the single-photon sequence.The following is a schematic diagram of the Two-Step QSDC protocol (Fig. 1).We set the sender for Alice, the receiver for the Bob, the specific process is
Quantum security direct communication is based on quantum physics, combined with the classic communication theory .It become a new communication model, its transmission of information on the high efficiency, security has been more and more extensive attention.That is, since the beginning of this century, has been rapid developed.In this paper, we will describe several common quantum secure direct communication protocols and economic quantum secure direct communication network models theoretically.At the end of this paper, we will discuss and analyze the development and the future of quantum safety direct communication. Quantum Direct Communication Protocol Two-Step QSDC Protocol.The two-Step QSDC protocol uses the protocol of the entangled particle pair and the single-photon sequence.The following is a schematic diagram of the Two-Step QSDC protocol (Fig. 1).We set the sender for Alice, the receiver for the Bob, the specific process is
Quantum security direct communication is based on quantum physics, combined with the classic communication theory.It becomes a new communication model, its transmission of information on the high efficiency, security has been more and more extensive attention.That is, since the beginning of this century, has been rapid developed.In this paper, we will describe several common quantum secure direct communication protocols and economic quantum secure direct communication network models theoretically.At the end of this paper, we will discuss and analyze the development and the future of quantum safety direct communication. Quantum Direct Communication Protocol Two-Step QSDC Protocol. The two-Step QSDC protocol uses the protocol of the entangled particle pair and the single-photon sequence. The following is a schematic diagram of the Two-Step
Quantum security direct communication is based on quantum physics, combined with the classic communication theory .It become a new communication model, its transmission of information on the high efficiency, security has been more and more extensive attention.That is, since the beginning of this century, has been rapid developed.In this paper, we will describe several common quantum secure direct communication protocols and economic quantum secure direct communication network models theoretically.At the end of this paper, we will discuss and analyze the development and the future of quantum safety direct communication.
Quantum security direct communication is based on quantum physics, combined with the classic communication theory .It become a new communication model, its transmission of information on the high efficiency, security has been more and more extensive attention.That is, since the beginning of this century, has been rapid developed.In this paper, we will describe several common quantum secure direct communication protocols and economic quantum secure direct communication network models theoretically.At the end of this paper, we will discuss and analyze the development and the future of quantum safety direct communication.
The quantum communication,based on the principle of quantum mechanics,could directly transmit secret information over the quantum channel,and could realize high security and high capacity.QSDC(Quantum Secure Direct Communication),as a new kind of quantum communication,could securely transtmit secret information directly over the quantum channel.QSDC has acquired fast development since proposed nearly ten years ago.Some typical quantum direct communication protocols or models adopted by QSDC are described in this paper,including entangled photo pairs-based two-step QSDC protocol and high dimensional quantum-based communication protocol.Meanwhile the development trend of QSDC is also briefed.
Quantum key distribution (QKD) is considered as an ideal method to make secret message unreadable to eaves-dropper but intelligible to the two authorized parties of the communication [1][2][3][4][5][6].In the research of experimental quantum key distribution, single photons and entangled photon pairs are used as the carriers.In quantum key distribution, secret keys are generated first between the communication parties.The security of quantum key distribution is guaranteed by the laws of quantum mechanics.After the quantum key distribution is completed, the communication parties should share secret keys, then the sender encrypts the secret message using the secret keys to form the ciphertext and transmits the ciphertext through a classical channel.The receiver receives the ciphertext and then decrypt the ciphertext to get the secret message.Altogether there are four steps in a secret communication process with QKD: key generation, encryption, transmission and decryption.Here in this review, we review some new development in quantum communication, quantum direct communication (QDC).Quantum direct communication is a form of quantum communication where secret messages can be transmitted through a quantum channel with or without additional classical communications.There are two forms of quantum direct communication, quantum secure direct communication (QSDC) [7{9] and deterministic secure quantum communication (DSQC) [10,11].In QSDC, secret messages are transmitted directly between the communication parties, from sender Alice to receiver Bob, without additional classical communication except those for the necessary eavesdropping check.In other words, the quantum key distribution process and the classical communication of ciphertext are condensed into one single quantum communication procedure in QSDC.Deterministic secure quantum communication is another type of quantum direct communication, such as those proposed in Ref. [10,11], where classical communication is required in order to read out the secret message.As mentioned earlier, to complete a secure communication with the help of QKD, one usually encodes the secret message with an encryption scheme, and the ciphered text is transmitted through a classical channel.With a quantum channel, this procedure can be varied.
Quantum secure direct communication (QSDC) enables direct private message transmission over quantum channels without pre-shared keys. This paper proposes a QSDC protocol based on two-step line-based quantum walks (QWs), which involves sender Alice, receiver Bob and an untrusted third party Charlie, and three stages consisting of preparing, checking quantum channel and communicating secret messages. In the first stage, Bob generates entangled states as the desired quantum channel via one-step QW and prepares decoy photons for the subsequent security checking of the quantum channel; In the second stage, Bob first sends a sequence comprising the photons from the entangled states and Bob’s decoy photons to Alice, who forwards Bob’s decoy photons along with her own decoy photons to Charlie for measurement, with Alice and Bob verifying security by comparing the measurement outcomes; In the third stage, Alice prepares a sequence of photons as coin state for encoding messages to be communicated, which along with the prepared entangled states form a quantum teleportation system, which completes the transmission of the messages under the dominance of another-step QW. Security analyses show the suggested protocol can resist against intercept-and-resend and measure-and-resend attacks, promoting the QSDC’s practicality via QW-based entanglement generation, simplified measurement operations and security checking under the assistance of the third party Charlie.