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Journal of Applied Sciences ›› 2012, Vol. 30 ›› Issue (1): 52-58.doi: 10.3969/j.issn.0255-8297.2012.01.009

• Communication Engineering • Previous Articles     Next Articles

Multi-party Quantum Covert Communication with Entanglement Private-Keys

CAO Dong1;2, SONG Yao-liang1   

  1. 1. School of Electronic Engineering and Optoelectronic Technology, Nanjing University
    of Science and Technology, Nanjing 210094, China
    2. College of communication and Information Engineering, Nanjing University
    of Posts and Telecommunication, Nanjing 210003, China
  • Received:2011-08-02 Revised:2011-10-12 Online:2012-02-09 Published:2012-01-30

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Abstract:

A novel scheme of quantum multi-party covert communication is proposed. Using a pseudo-random
sequence, the random subset is selected from a set of Greenberger-Horne-Zeilinger (GHZ) shared private-key forencryption. Quantum information is rotated and hidden by disguising it as noise in a quantum error-correcting
code. A subset of detection is constructed and based on the complement of shared private-keys. Based on the
detection scheme of typical error, the private-key can be recycled. Compared to other protocols which require
more private keys, the proposed scheme can significantly reduce key consumption. The ability of eavesdrop
detection is optimized. The optimized scheme is robust to the Trojan horse attacking.

Key words: information security, covert communication, quantum cryptography, entanglement private-key

CLC Number: