Journal
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
Volume 375, Issue 2, Pages 693-698Publisher
ELSEVIER
DOI: 10.1016/j.physa.2006.09.022
Keywords
block encryption algorithm; qubit; hybrid keys; key management; quantum cryptography
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By combining quantum key with classical one, a novel block cryptographic algorithm that can be applied to encrypt qubits is presented. The security of the algorithm is analyzed from several aspects. It is shown that the qubit block encryption algorithm can prevent quantum attacking strategy as well as classical attacking strategy. The hybrid keys are securely reusable after a checking process, which lessens the task of key management significantly. The proposed algorithm offers an alternative to the standard one-time-pad encryption of a quantum bit string using a quantum key. (c) 2006 Elsevier B.V. All rights reserved.
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