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Optimal dimensionality for quantum cryptography

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2 Author(s)
Horoshko, D.B. ; Inst. of Phys., Belarus Nat. Acad., Minsk, Belarus ; Kilin, S.Ya.

Two protocols are compared for sharing between Alice and Bob a cryptographic key composed from quarts. The first protocol uses a ququart (4-level system) prepared in one of 5 mutually biased bases. The second one uses two independent qubits, each being prepared in one of 3 mutually unbiased bases. Information gained by the eavesdropper Eve is calculated, suggesting that she uses an asymmetric cloner for cloning individual systems.

Published in:

Quantum Electronics Conference, 2003. EQEC '03. European

Date of Conference:

22-27 June 2003