Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.70.032306
Title: Quantum cryptography: Security criteria reexamined
Authors: Kaszlikowski, D. 
Gopinathan, A.
Liang, Y.C. 
Kwek, L.C. 
Englert, B.-G. 
Issue Date: Sep-2004
Source: Kaszlikowski, D., Gopinathan, A., Liang, Y.C., Kwek, L.C., Englert, B.-G. (2004-09). Quantum cryptography: Security criteria reexamined. Physical Review A - Atomic, Molecular, and Optical Physics 70 (3) : 032306-1. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.70.032306
Abstract: The generally accepted security criteria for a whole class of protocols for quantum cryptography was analyzed. It was shown that the security criteria are flawed. The reason of the flaw was a standard assumption of the security analysis, namely that the so-called square-root measurement is optimal for eavesdropping purposes, is not true in general. The results show that there are rather large parameter regimes in which the optimal measurement extracts substantially more information that the square-root measurement.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
URI: http://scholarbank.nus.edu.sg/handle/10635/97670
ISSN: 10502947
DOI: 10.1103/PhysRevA.70.032306
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