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Computers, materials & continua/Computers, materials & continua (Print)

Analysis and Improvement of an Efficient Controlled Quantum Secure Direct Communication and Authentication Protocol

Jifeng Zhong, Zhihao Liu and Juan Xu

Published Jan 1, 2018• 17 citations
Publisher

Abstract

The controlled quantum secure direct communication (CQSDC) with authentication protocol based on four particle cluster states via quantum one-time pad and local unitary operations is cryptanalyzed. It is found that there are some serious security issues in this protocol. An eavesdropper (Eve) can eavesdrop on some information of the identity strings of the receiver and the controller without being detected by the selective-CNOT-operation (SCNO) attack. By the same attack, Eve can also steal some information of the secret message that the sender transmits. In addition, the receiver can take the same kind of attack to eavesdrop on some information of the secret message out of the control of the controller. This means that the requirements of CQSDC are not satisfied. At last, we improve the original CQSDC protocol to a secure one.

DOI
10.32604/cmc.2018.03706

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The controlled quantum secure direct communication (CQSDC) with authentication protocol based on four particle cluster states via quantum one-time pad and local unitary operations is cryptanalyzed. It is found that there are some serious security issues in this protocol. An eavesdropper (Eve) can eavesdrop on some information of the identity strings of the receiver and the controller without being detected by the selective-CNOT-operation (SCNO) attack. By the same attack, Eve can also steal some information of the secret message that the sender transmits. In addition, the receiver can take the same kind of attack to eavesdrop on some information of the secret message out of the control of the controller. This means that the requirements of CQSDC are not satisfied. At last, we improve the original CQSDC protocol to a secure one.
In this paper, a three-party controlled quantum secure direct communication and authentication (QSDCA) protocol is proposed by using four particle cluster states via a quantum one-time pad and local unitary operations. In the present scheme, only under the permission of the controller, the sender and the receiver can implement secure direct communication successfully. But under any circumstances, Charlie cannot obtain the secret message. Eavesdropping detection and identity authentication are achieved with the help of the previously shared reusable base identity strings of users. This protocol is unconditionally secure in both ideal and practical noisy cases. In one transmission, a qubit of each four particle cluster state is used as controller’s permission and the same qubit with another qubit are used to recover two classical bits of information. In the proposed scheme, the efficiency is improved compared with the previous works.
A new controlled quantum secure direct communication (CQSDC) protocol is presented by using a four-particle cluster state as quantum channel and the physical characteristics of controlled quantum teleportation to implement the transmission and the control. In this scheme, the receiver can receive the secret message from the sender and recover the secret message under the permission of the controller. According to the security analysis, the communication is secure against both participant and outside attacks, so this CQSDC protocol is secure and feasible.
To transmit secure message, a controlled quantum secure direct communication protocol is proposed based on five-particle cluster state and EPR pair entanglement swapping. The sender and the controller own their EPR pair sequences respectively. The sender sends one photon of the EPR pair he owns to controller. The controller performs local unitary operation randomly on one photon of the EPR pair he owns and sends it to the receiver as his permission. The sender encodes his secret message on the other photon of the EPR pair he owns and sends it to the receiver. Because of EPR pair entanglement swapping, the two photons in the receiver's hand entangled. Under the permission of the controller, the controller and the receiver measure their new EPR pairs in the Bell basis in turn. By comparing the measurement result of the receiver and the original state, the receiver can get the secret message. To ensure the security of the message transmitting, five photons of five-particle cluster state are all mixed in sending sequence to detect eavesdropping which can bring per qubit 88% eavesdropping detection probability. Compared with taking three photons of five-particle cluster state as detection photons, five photons in this paper will decrease the number of five-particle cluster state for detection greatly. The security of the present protocol is discussed: the detection probability of this protocol is more than 88%, and intercept-measure-resend attacks and correlation-elicitation (CE) attack can be defended effectively.
Abstract In this paper, after quantum identity authentication is applied into controlled quantum secure direct communication (CQSDC), a CQSDC protocol with twice identity authentications is put forward based on the entanglement swapping of Bell states. In this protocol, firstly, the user Alice and the user Bob respectively utilize decoy single particles to accomplish the identity authentications with the semi-honest control center Charlie; then, Alice and Bob utilize the entanglement swapping of Bell states to finish the identity authentication between them; and finally, Alice utilizes the entanglement swapping of Bell states to transmit her secret message directly to Bob. This protocol is validated to be able to resist the internal attacks from Charlie and the outside attacks from Eve. The correctness of this protocol is proven by the quantum circuit simulations on IBM Qiskit quantum cloud platform.
The security of quantum broadcast communication (QBC) and authentication protocol based on Greenberger–Horne–Zeilinger (GHZ) state and quantum one-time pad is analyzed. It is shown that there are some security issues in this protocol. Firstly, an external eavesdropper can take the intercept–measure–resend attack strategy to eavesdrop on 0.369 bit of every bit of the identity string of each receiver without being detected. Meanwhile, 0.524 bit of every bit of the secret message can be eavesdropped on without being detected. Secondly, an inner receiver can take the intercept–measure–resend attack strategy to eavesdrop on half of the identity string of the other's definitely without being checked. In addition, an alternative attack called the CNOT-operation attack is discussed. As for the multi-party QBC protocol, the attack efficiency increases with the increase of the number of users. Finally, the QBC protocol is improved to a secure one.
Due to the better robustness of entangled W state,it is considered to be better qualified as information carrier for quantum information processing and quantum secure communication. Recently,many kinds of quantum direct communication protocols based on four-particle W state or three-particle asymmetric W state have been proposed. However,these protocols either have low communication efficiency or are difficult to be implemented in physics experiment. By utilizing three-particle W state and the mechanism of quantum identity authentication,a new deterministic secure quantum communication protocol was proposed. This protocol consisted of five parts: authentication code generating,quantum states preparation,quantum states distribution,eavesdropping check and identity authentication,and information communication. The two participants only needed to perform the two-particle Bell measurement,the single-particle Z-basis or X-basis measurement,and the communication efficiency was also improved: One W state can transmit one classical bit of information. The security analysis shows that the present protocol is secure against various eavesdropper Eve's attacks and impersonation attacks,so it has better security.