Information investigation for B92 protocol in quantum cryptography

Ming Zou; Guoping Zhang

doi:10.1117/12.569663

11 January 2005 Information investigation for B92 protocol in quantum cryptography

Ming Zou, Guoping Zhang

Proceedings Volume 5631, Quantum Optics and Applications in Computing and Communications II; (2005) https://doi.org/10.1117/12.569663
Event: Photonics Asia, 2004, Beijing, China

Abstract

In this paper, we simulate the quantum channel with a binary symmetric channel and a binary erasure channel, a series channel and a Markovian chain channel in classical information theory, then calculate respectively the mutual information between the signal's deliverer, the legal receiver and the eavesdropper, the bit error rate during propagating the signals with the theory about the quantum measurement channel and the quantum information theory. For B92 protocol, a simple quantum cryptography distribution scheme, we study the bound and the property of mutual information obtained by the legal receiver and the eavesdropper, seek the relationship between the bit error rates and the eavesdropper's way, in two cases of the opaque eavesdropping and the translucent eavesdropping. A new criteria for checking the eavesdropper and ensuring the legal correspondent is estimated. Furthermore, the comparison in bit error rates caused respectively in two different measuring ways indicates that POVM is better than the standard measurement by the way of orthogonal projecting for reducing the bit error rate and increasing effective communication.

Citation Download Citation

Ming Zou and Guoping Zhang "Information investigation for B92 protocol in quantum cryptography", Proc. SPIE 5631, Quantum Optics and Applications in Computing and Communications II, (11 January 2005); https://doi.org/10.1117/12.569663

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