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Quantum cryptography: Security criteria reexamined
Citation
Kaszlikowski, D., Ajay Gopinathan, Liang, Y. C., Kwek, L. C., & Englert, B.-G. (2004). Quantum cryptography: Security criteria reexamined. Physical Review A, 70(3), Article 032306. https://doi.org/10.1103/PhysRevA.70.032306
Author
Kaszlikowski, Dagomir
•
Ajay Gopinathan
•
Liang, Yeong Cherng
•
•
Englert, Berthold-Georg
Abstract
We find that the generally accepted security criteria are flawed for a whole class of protocols for quantum cryptography. This is so because 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. There are rather large parameter regimes in which the optimal measurement extracts substantially more information than the square-root measurement.
Date Issued
2004
Publisher
American Physical Society
Journal
Physical Review A
DOI
10.1103/PhysRevA.70.032306