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A realizable quantum encryption algorithm for qubits

Keywords: quantum encryption algorithm,quantum computation,cryptography
量子编码算法
,量子计算,密码系统,系统扩展,计算机安全

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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.

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