中国物理B ›› 2013, Vol. 22 ›› Issue (6): 60307-060307.doi: 10.1088/1674-1056/22/6/060307

• GENERAL • 上一篇    下一篇

Steganalysis and improvement of a quantum steganography protocol via GHZ4 state

徐淑奖a b c, 陈秀波a c, 钮心忻a, 杨义光a   

  1. a Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    b Shandong Provincial Key Laboratory of Computer Network, Shandong Computer Science Center, Jinan 250014, China;
    c State Key Laboratory of Information Security, (Institute of Information Engineering, Chinese Academy of Sciences), Beijing 100093, China
  • 收稿日期:2012-11-07 修回日期:2012-12-24 出版日期:2013-05-01 发布日期:2013-05-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61170272, 61272514, 61003287, and 61070163), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20100005120002), the Fok Ying Tong Education Foundation (Grant No. 131067), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2011FM023), the Outstanding Research Award Fund for Young Scientists of Shandong Province, China (Grant No. BS2011DX034), and the Fundamental Research Funds for Central Universities of China (Grant No. BUPT2012RC0221).

Steganalysis and improvement of a quantum steganography protocol via GHZ4 state

Xu Shu-Jiang (徐淑奖)a b c, Chen Xiu-Bo (陈秀波)a c, Niu Xin-Xin (钮心忻)a, Yang Yi-Xian (杨义光)a   

  1. a Information Security Center, State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China;
    b Shandong Provincial Key Laboratory of Computer Network, Shandong Computer Science Center, Jinan 250014, China;
    c State Key Laboratory of Information Security, (Institute of Information Engineering, Chinese Academy of Sciences), Beijing 100093, China
  • Received:2012-11-07 Revised:2012-12-24 Online:2013-05-01 Published:2013-05-01
  • Contact: Chen Xiu-Bo E-mail:flyover100@163.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61170272, 61272514, 61003287, and 61070163), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20100005120002), the Fok Ying Tong Education Foundation (Grant No. 131067), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2011FM023), the Outstanding Research Award Fund for Young Scientists of Shandong Province, China (Grant No. BS2011DX034), and the Fundamental Research Funds for Central Universities of China (Grant No. BUPT2012RC0221).

摘要: Quantum steganography that utilizes quantum mechanical effect to achieve the purpose of information hiding is a popular topic of quantum information. Recently, El Allati et al. proposed a new quantum steganography using GHZ4 state. Since all of the 8 groups of unitary transformations used in the secret message encoding rule change the GHZ4 state into 6 instead of 8 different quantum states when the global phase is not considered, we point out that a 2-bit instead of a 3-bit secret message can be encoded by one group of the given unitary transformations. To encode a 3-bit secret message by performing a group of unitary transformations on the GHZ4 state, we give another 8 groups of unitary transformations that can change the GHZ4 state into 8 different quantum states. Due to the symmetry of the GHZ4 state, all the possible 16 groups of unitary transformations change the GHZ4 state into 8 different quantum states, so the improved protocol achieves a high efficiency.

关键词: quantum steganography, GHZ4 entangled state, quantum cryptography, quantum communication

Abstract: Quantum steganography that utilizes quantum mechanical effect to achieve the purpose of information hiding is a popular topic of quantum information. Recently, El Allati et al. proposed a new quantum steganography using GHZ4 state. Since all of the 8 groups of unitary transformations used in the secret message encoding rule change the GHZ4 state into 6 instead of 8 different quantum states when the global phase is not considered, we point out that a 2-bit instead of a 3-bit secret message can be encoded by one group of the given unitary transformations. To encode a 3-bit secret message by performing a group of unitary transformations on the GHZ4 state, we give another 8 groups of unitary transformations that can change the GHZ4 state into 8 different quantum states. Due to the symmetry of the GHZ4 state, all the possible 16 groups of unitary transformations change the GHZ4 state into 8 different quantum states, so the improved protocol achieves a high efficiency.

Key words: quantum steganography, GHZ4 entangled state, quantum cryptography, quantum communication

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

  • 03.67.Dd
03.67.-a (Quantum information) 03.65.-w (Quantum mechanics) 03.67.Hk (Quantum communication)