Quantum Cryptography: Security Criteria Reexamined
Quantum Physics
2009-11-10 v2
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.
Cite
@article{arxiv.quant-ph/0310144,
title = {Quantum Cryptography: Security Criteria Reexamined},
author = {Dagomir Kaszlikowski and Ajay Gopinathan and Yeong Cherng Liang and L. C. Kwek and Berthold-Georg Englert},
journal= {arXiv preprint arXiv:quant-ph/0310144},
year = {2009}
}
Comments
4 pages, 4 figures. No substantial changes. Updated version as published in PRA