A realizable quantum encryption algorithm for qubits
Zhou Nan-Run (周南润), Zeng Gui-Hua (曾贵华)
The State Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems, Electronic Engineering Department, Shanghai Jiaotong University, Shanghai 200030, China
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.
Received: 15 October 2004
Revised: 20 May 2005
Accepted manuscript online:
Fund: 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).
Cite this article:
Zhou Nan-Run (周南润), Zeng Gui-Hua (曾贵华) A realizable quantum encryption algorithm for qubits 2005 Chinese Physics 14 2164
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