Optimal dimensionality for quantum cryptography |
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Authors: | D. B. Horoshko S. Ya. Kilin |
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Affiliation: | (1) Institute of Physics, National Academy of Sciences of Belarus, Minsk, 220072, Belarus |
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Abstract: | A comparison of two protocols for generating a cryptographic key composed from d-valued symbols, one using a string of independent qubits and another utilizing d-level systems prepared in states belonging to d + 1 mutually unbiased bases, is performed. The protocol based on qubits is shown to be optimal for quantum cryptography, since it provides higher security and a higher key generation rate. |
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