中国物理B ›› 2005, Vol. 14 ›› Issue (11): 2164-2169.doi: 10.1088/1009-1963/14/11/004

• GENERAL • 上一篇    下一篇

A realizable quantum encryption algorithm for qubits

周南润, 曾贵华   

  1. The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems, Electronic Engineering Department, Shanghai Jiaotong University, Shanghai 200030, China
  • 收稿日期:2004-10-15 修回日期:2005-05-20 出版日期:2005-11-20 发布日期:2005-11-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60472018 and 90104005) and by the Doctoral Programs Foundation of the Ministry of Education of China (Grant No 20020247063).

A realizable quantum encryption algorithm for qubits

Zhou Nan-Run (周南润), Zeng Gui-Hua (曾贵华)   

  1. The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems, Electronic Engineering Department, Shanghai Jiaotong University, Shanghai 200030, China
  • Received:2004-10-15 Revised:2005-05-20 Online:2005-11-20 Published:2005-11-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 60472018 and 90104005) and by the Doctoral Programs Foundation of the Ministry of Education of China (Grant No 20020247063).

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摘要： A realizable quantum encryption algorithm for qubits is presented by employing bit-wise quantum computation. System extension and bit-swapping are introduced into the encryption process, which makes the ciphertext space expanded greatly. The security of the proposed algorithm is analysed in detail and the schematic physical implementation is also provided. It is shown that the algorithm, which can prevent quantum attack strategy as well as classical attack strategy, is effective to protect qubits. Finally, we extend our algorithm to encrypt classical binary bits and quantum entanglements.

Abstract: A realizable quantum encryption algorithm for qubits is presented by employing bit-wise quantum computation. System extension and bit-swapping are introduced into the encryption process, which makes the ciphertext space expanded greatly. The security of the proposed algorithm is analysed in detail and the schematic physical implementation is also provided. It is shown that the algorithm, which can prevent quantum attack strategy as well as classical attack strategy, is effective to protect qubits. Finally, we extend our algorithm to encrypt classical binary bits and quantum entanglements.

Key words: quantum encryption algorithm, quantum computation, cryptography

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

  • 03.67.Dd
03.67.Lx (Quantum computation architectures and implementations) 03.65.Ud (Entanglement and quantum nonlocality)