中国物理B ›› 2015, Vol. 24 ›› Issue (5): 50307-050307.doi: 10.1088/1674-1056/24/5/050307

• GENERAL • 上一篇    下一篇

Robust quantum secure direct communication and authentication protocol against decoherence noise based on six-qubit DF state

昌燕, 张仕斌, 闫丽丽, 韩桂华   

  1. Department of Network Engineering, Chengdu University of Information Technology, Chengdu 610225, China
  • 收稿日期:2014-09-22 修回日期:2014-11-26 出版日期:2015-05-05 发布日期:2015-05-05
  • 基金资助:
    Project Project Project of Sichuan Province of China (Grant No. 12ZB017), and the Foundation of Cyberspace Security Key Laboratory of Sichuan Higher Education Institutions, China (Grant No. szjj2014-074).

Robust quantum secure direct communication and authentication protocol against decoherence noise based on six-qubit DF state

Chang Yan (昌燕), Zhang Shi-Bin (张仕斌), Yan Li-Li (闫丽丽), Han Gui-Hua (韩桂华)   

  1. Department of Network Engineering, Chengdu University of Information Technology, Chengdu 610225, China
  • Received:2014-09-22 Revised:2014-11-26 Online:2015-05-05 Published:2015-05-05
  • Contact: Chang Yan E-mail:cyttkl@cuit.edu.cn
  • About author:03.67.Dd; 03.67.Hk; 03.67.-a; 03.65.Ud
  • Supported by:
    Project Project Project of Sichuan Province of China (Grant No. 12ZB017), and the Foundation of Cyberspace Security Key Laboratory of Sichuan Higher Education Institutions, China (Grant No. szjj2014-074).

摘要: By using six-qubit decoherence-free (DF) states as quantum carriers and decoy states, a robust quantum secure direct communication and authentication (QSDCA) protocol against decoherence noise is proposed. Four six-qubit DF states are used in the process of secret transmission, however only the |0'> state is prepared. The other three six-qubit DF states can be obtained by permuting the outputs of the setup for |0'>. By using the |0'> state as the decoy state, the detection rate and the qubit error rate reach 81.3%, and they will not change with the noise level. The stability and security are much higher than those of the ping–pong protocol both in an ideal scenario and a decoherence noise scenario. Even if the eavesdropper measures several qubits, exploiting the coherent relationship between these qubits, she can gain one bit of secret information with probability 0.042.

关键词: quantum secure direct communication, decoherence noise, authentication, six-qubit decohevence-free state

Abstract: By using six-qubit decoherence-free (DF) states as quantum carriers and decoy states, a robust quantum secure direct communication and authentication (QSDCA) protocol against decoherence noise is proposed. Four six-qubit DF states are used in the process of secret transmission, however only the |0'> state is prepared. The other three six-qubit DF states can be obtained by permuting the outputs of the setup for |0'>. By using the |0'> state as the decoy state, the detection rate and the qubit error rate reach 81.3%, and they will not change with the noise level. The stability and security are much higher than those of the ping–pong protocol both in an ideal scenario and a decoherence noise scenario. Even if the eavesdropper measures several qubits, exploiting the coherent relationship between these qubits, she can gain one bit of secret information with probability 0.042.

Key words: quantum secure direct communication, decoherence noise, authentication, six-qubit decohevence-free state

中图分类号:  (Quantum cryptography and communication security)

  • 03.67.Dd
03.67.Hk (Quantum communication) 03.67.-a (Quantum information) 03.65.Ud (Entanglement and quantum nonlocality)