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Dianzi xuebao

Controlled Quantum Network Coding Scheme Based on Single Controller

Shang Ta

Published Jan 1, 2014• 2 citations
OpenAlex

Abstract

This paper proposes a controlled quantum netw ork coding scheme based on single controller so as to control the decoding operation at the receivers for traditional quantum netw ork coding schemes.This scheme is designed based on the paradigm XQQ( Crossing Tw o Qubits) protocol,and it can control the decoding process of tw o receivers simultaneously by means of introducing the controller in controlled teleportation.Scheme analyses show that w ithout the permission of the controller,any attacker cannot decode and acquire the quantum information from the senders in this scheme,even if he can get all the information of the receivers.Thus our scheme can enhance the security of transferring quantum information in quantum netw orks.

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This paper proposes a controlled quantum netw ork coding scheme based on single controller so as to control the decoding operation at the receivers for traditional quantum netw ork coding schemes.This scheme is designed based on the paradigm XQQ( Crossing Tw o Qubits) protocol,and it can control the decoding process of tw o receivers simultaneously by means of introducing the controller in controlled teleportation.Scheme analyses show that w ithout the permission of the controller,any attacker cannot decode and acquire the quantum information from the senders in this scheme,even if he can get all the information of the receivers.Thus our scheme can enhance the security of transferring quantum information in quantum netw orks.
This letter proposes new quantum network coding schemes based on controlled teleportation to control the decoding process of receivers in a butterfly network. Firstly, a quantum network coding scheme with two controllers is proposed based on the paradigm XQQ (crossing two qubits) protocol. Then the other scheme based on the perfect quantum network coding protocol with prior entanglement is designed for high fidelity. By introducing the controller, our schemes realize that the decoding process of unicast stream can be controlled, which is helpful to extend these schemes to a general network with unicast or multicast. Our schemes also provide a convenient model to combine authentication into quantum network and would be significant to enhance the security of quantum communication.
The aim of controlled quantum teleportation is to realize communication between Alice and Bob to cooperate with a trusted controller Charlie successfully. However, we show that the dishonest Bob can obtain the initial Alice's secret message with 50 percents without the permission of Charlie. We propose an improved controlled quantum teleportation scheme by using quantum entanglement swapping in quantum communication. The receiver Bob is identified by the trusted Charlie. After the sender Alice gets the feedback information from Charlie, he can make sure the identity of Bob and then sends the quantum information to Bob. The scheme can effectively prevent forged identity attack to ensure the security of quantum teleportation. We also propose a quantum teleportation scheme with identity authentication in controlled quantum network with multiple users and controllers.
We present a scheme for teleporting multi-qutrit quantum information from a sender to a receiver via the control of many agents in a network. Agents's control parameters are obtained via quantum entanglement swapping. In our scheme, Zhang and Man's QSS protocol [Phys. Rev. A 72 (2005) 022303] based on Bell-state entanglement swapping is generalized to a qutrit case. Our scheme owns the advantage of having higher code capacity and better security than the work [Commun. Theor. Phys. 44 (2005) 847] on controlled teleportation for multi-qubit.
In small quantum netw ork,the security of communication information can be guaranteed physically by the application of quantum teleportation,the noise of quantum channel w ill be bound to interfere w ith the communication information,leading to the error of code. In order to guarantee the reliability of information communication,a routing protocol of small quantum netw ork is proposed based on quantum error correcting code. According to the routing characteristics of small quantum netw ork,corresponding routing tables are made. On the basis of these routing tables,quantum teleportation can be realized from source quantum node to the nodes w ithin one-hop or tw o-hop. Correct the errors of code resulting from noise of quantum channel based on error correcting code theory,and handle it accordingly,to ensure the reliability of communication information at data link layer. The security of the protocol is proved in theory.
A scheme is proposed to realize the controlled dense coding by using a four-particle entangled state as the quantum channel. In this scheme, A and B are the sides of sender and receiver, C and D are used as the controlling particles. A, C and D should perform appropriate quantum operations on the particles that they own respectively, then they must transfer the particles to B. After a series of quantum operations, quantum transformations and quantum measurements, B would get the quantum state which can represent classical field information. By using this scheme, A and B realize the information teleportation of classical field 0～15 in the quantum channel.
In this paper, a quantum teleportation protocol has been proposed that can simultaneously transmit quantum states in four directions using a single entangled channel. This means that there are four senders who want to transmit state information, and they are Alice, Bob, Charlie, and David. In order to ensure the security of information transmission, the information state of the four is transmitted to four receivers Fancy1, Fancy2, Fancy3, and Fancy4 under the control of the controller Elle. Through unitary transformation and entanglement property, receivers can recover the original quantum state from the four senders, which is easy to implement. The teleportation protocol is perfect.