Fifth Seminar in memory of D.N. Klyshko

Quantum cryptography: individual eavesdropping with the knowledge of the error-correcting protocol

D. B. Horoshko

B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk

Abstract: The quantum key distribution protocol BB84 combined with the repetition protocol for error correction is analysed from the point of view of its security against individual eavesdropping relying on quantum memory. It is shown that the mere knowledge of the error-correcting protocol changes the optimal attack and provides the eavesdropper with additional information on the distributed key.

PACS: 03.67.Dd, 03.67.Pp

Received: 05.07.2007

 English version: Quantum Electronics, 2007, 37:12, 1105–1108

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