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Quantum Cryptography Based on Orthogonal States
Published 1995-02-25Version 1
All existing quantum cryptosystems use non-orthogonal states as the carriers of information. Non-orthogonal states cannot be cloned (duplicated) by an eavesdropper. In result, any eavesdropping attempt must introduce errors in the transmission, and therefore, can be detected by the legal users of the communication channel. Orthogonal states are not used in quantum cryptography, since they can be faithfully cloned without altering the transmitted data. In this Letter we present a cryptographic scheme based on orthogonal states, which also assures the detection of any eavesdropper.
Comments: Latex, 10 pages, 1 figure (decompress with "uudecode" and "unzip"). Submitted to Physical Review Letters.
Journal: Phys.Rev.Lett.75:1239-1243,1995
Categories: quant-ph
Keywords: quantum cryptography, non-orthogonal states, cryptographic scheme, existing quantum cryptosystems, eavesdropper
Tags: journal article
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