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A quasi quantum secure direct communication protocol with authentication

Chen Zuning, Zheng Qin, Xianhui Wang

Published Jul 1, 2010• 1 citation
Publisher

Abstract

The quantum communication is a new-style communication scheme based on quantum mechanics. It arouses much interest recently. In this paper, a novel quantum secure communication protocol is proposed. This is a quasi quantum secure direct communication protocol, since it closely unites the quantum key distribution and the classical communication. In the protocol, a key is distributed between both parties participating in communication using EPR pairs, the secret message is sent through classical public channel and the both are closely combined. The protocol applies a braid-based key agreement protocol to let both parties share a secret random number, whose size and magnitude are undecided in advance. It is used to perform all the authentications of the communication. So the communication is simplified. The security of the proposed protocol is based on the no-cloning theorem and the fact that the p-th root finding problem on braid groups is intractable even on quantum computers, as well as classical computers.

DOI
10.1109/iccsit.2010.5563973

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The quantum communication is a new-style communication scheme based on quantum mechanics. It arouses much interest recently. In this paper, a novel quantum secure communication protocol is proposed. This is a quasi quantum secure direct communication protocol, since it closely unites the quantum key distribution and the classical communication. In the protocol, a key is distributed between both parties participating in communication using EPR pairs, the secret message is sent through classical public channel and the both are closely combined. The protocol applies a braid-based key agreement protocol to let both parties share a secret random number, whose size and magnitude are undecided in advance. It is used to perform all the authentications of the communication. So the communication is simplified. The security of the proposed protocol is based on the no-cloning theorem and the fact that the p-th root finding problem on braid groups is intractable even on quantum computers, as well as classical computers.
The quantum secure direct communication is a new-style quantum communication scheme. It arouses much interest recently. The ping-pong protocol proposed by Bostroem and Felbinger is one of relatively mature quantum secure direct communication protocols, which is asymptotically secure under Eve's eavesdropping attack. But it ignores the message authentication. Being aimed at this problem, we propose a novel ping-pong protocol with authentication. The former has two operation modes, or the message mode and the control mode, which are used to send message and detect Eve's attack, respectively. But it just detects Eve's eavesdropping attack and does not authenticate the sent message in the control mode. The latter has also the above two operation modes, which employs a braid-based key agreement protocol for both the parties participating in communication to share a secret, whose size and magnitude are undecided in advance. Using the shared secret, it not only detects Eve's eavesdropping attack, but also effectively performs the message authentication in the control mode. It is also asymptotically secure under Eve's eavesdropping attack. The security of the proposed protocol is based on the no-cloning theorem, the correlations of quantum entanglement and the fact that the p-th root finding problem on braid groups is intractable even on quantum computers, as well as classical computers. In addition different from the original ping-pong protocol, the communication was initiated by the sender Alice instead of by the receiver Bob. This corresponds to the way of common communications. The present protocol not only can resist the attacks known recently, but should be experimentally feasible using today's technology.
Quantum secure direct communication (QSDC) can transmit secret messages directly from one user to another without first establishing a shared secret key, which is different from quantum key distribution. In this paper, we propose a novel quantum secure direct communication protocol based on signal photons and Bell states. Before the execution of the proposed protocol, two participants Alice and Bob exchange their corresponding identity IDA and IDB through quantum key distribution and keep them secret, respectively. Then the message sender, Alice, encodes each secret message bit into two single photons (| 01〉or|10〉) or a Bell state , and composes an ordered secret message sequence. To insure the security of communication, Alice also prepares the decoy photons and inserts them into secret message sequence on the basis of the values of IDA and IDB. By the secret identity IDA and IDB, both sides of the communication can check eavesdropping and identify each other. The proposed protocol not only completes secure direct communication, but also realizes the mutual authentication. The security analysis of the proposed protocol is presented in the paper. The analysis results show that this protocol is secure against some common attacks, and no secret message leaks even if the messages are broken. Compared with the two-way QSDC protocols, the presented protocol is a one-way quantum communication protocol which has the immunity to Trojan horse attack. Furthermore, our proposed protocol can be realized without quantum memory.
The reported research in literature for message transformation by a third party does not provide the necessary efficiency and security against different attacks. The data transmitted through the computer network must be confidential and authenticated in advance. In this paper, we develop and improve security of the braided single stage quantum cryptography. This improvement is based on a novel authentication algorithm by using signature verification without using the three stages protocol to share the secret key between the sender and receiver. This approach will work against attacks such as replay and man-in-the-middle by increasing the security as well as the over efficiency, reducing the overhead through using three stages and increasing the speed of the communication between two parties.
The security of Quantum Secure Direct Communication (QSDC) and its authentication procedure based on multiple stages is analyzed. The security analysis shows that the process of authentication is required to be done three times based on the usage of unitary transformation that is only known between Alice and Bob. In the proposed protocol, a secure quantum handshake is utilized to share the secret polarization angle and an authentication key at the initial stage of authentication over the quantum channel. The symmetry key is used in this work to protect user data communication within the QSDC protocol, where the same secret key is used to encrypt and decrypt the message. This work adopts the information travel time (ITT) by allowing the sender to detect any interference from third parties. In addition, the operation of the Pauli-X quantum gate increases Eve’s difficulty in stealing the information. The information transmitted is then continued by sending photons once in the quantum channel, which improves the efficiency without losing the message’s security. In addition, to securely transfer the stream of messages, the proposed protocol is operated in single-stage, and the authentication is applied bit-by-bit, thus reducing the transmission time. Security checks are carried out along the data transmission process. Compared to previous protocols, this new initial authentication protocol has remarkable advantages since it does not require public communication to pre-share the authentication key and secret angles before the onset of the transmission, therefore, reducing the communication cost. Moreover, the secret authentication key and polarization angles are updated after a number of bits are sent to increase the security level. The verification process is also conducted to ensure the symmetry of the sender and receiver. The analyses presented herein demonstrate that the proposed authentication protocol is simple and secure in order to ensure the legitimacy of the users.
A multiparty controlled bidirectional quantum secure direct communication and authentication protocol is proposed based on EPR pair and entanglement swapping. The legitimate identities of communicating parties are encoded to Bell states which act as a detection sequence. Secret messages are transmitted by using the classical XOR operation, which serves as a one-time-pad. No photon with secret information transmits in the quantum channel. Compared with the protocols proposed by Wang et al. [Acta Phys. Sin. 56 (2007) 673; Opt. Commun. 266 (2006) 732 ], the protocol in this study implements bidirectional communication and authentication, which defends most attacks including the 'man-in-the-middle' attack efficiently.